Agent misrepresented promotion and loyalty bonus which resulted in loss of service and increased costs

I opened a chat with xfinity tech services to ask about a replacement remote control. The tech nicians name was Harish. He provided information and then told me he would be able to lower my bill based on current promotions and loyalty offers. I told him to send me offer in writing, but he didn't and kept trying to get me to purchase an iPad and that it would be free based on offers. My plan at the time consisted of HD Complete XF, Blast! Internet and Xfinity
Voice Unlimited. When I discovered that the free iPad really cost $46 a month ($26 for device and $20 for cellular service) I told him I was not interested. He then tried to get me to add a mobile line. I told him I was happy with my current cellular phone service and was not interested in adding a line. 

I then asked if he could save me money without a mobile line to which he said he would discuss with his manager and came back saying that he could. I asked if there was any difference between the current plan and the one I have and he said that it was. I then inquired whether all my premium channels (which I listed) were included and he said they were.  The only difference was and increase in Internet speed from 800 MB to 1 GB. He said he would be able to take my plan down from $347 to $299.  My current bill was $374 which I assumed included taxes. I asked for the plan in writing, instead of an itemized list of what was included, I received a link to a page that showed additions and deletions to my account. 

Based on the fact that twice he said it included all my current services and the fact that no where on the site could I find what my current plan included nor could I see itemized list of premium services, I approved the plan. 

I was happy thinking I was able to save $50 as a loyal customer for 30 years. However, when I tried to watch one of my premium channels an hour later, I received an error. I called tech services to see if they just needed to be activated and was told that it would take 72 hours for a chat initiate service change to take effect. I told him that that was unacceptable and he consulted with someone offline and came back and told me that the premium services were not included with my new changes. I reviewed what I had prior top the change and he confirmed that that they would need to be added and the cost was $43. I explained about the misrepresentation by Harish of all things being the same between the plans and he said he would try to get me back to the old plan. He came back and said that would not be the case, so I begrudgingly agreed to add the premium channels back, thinking that at least my bill was still reduced from $374 to $330.

Then later that evening, when I tried to watch TV in another room, I received an error. I called tech help to see if it was just that the boxes needed to be activated and was told that the additional 3 boxes I had were not included in my new service. To activate them, I would need to pay and additional $14 per device which would bring my new bill to over $380. 

So in summary, I contact xfinity to replace a remote, I was conned into "de-grandfathering" my legacy plan. 

I phoned customer service the next morning and, although they understand my issue and agreed that it was not right, because I approved  the chance and accepted the terms,  it might be difficult to get back to the old plan. They opened an escalation of the matter and said that someone would get back to me on Monday (today). I am waiting to hear back on this  the matter.  

After looking through posts on this forum, I see I am not the only one that has been duped into changing plan to get a better deal. I am concerned that xfinity has a program where technicians (not salespeople) try to force customers off of legacy plans. 

I am hoping that this gets resolved, however, if it is not, this is a deal breaker for me, a 30+ year loyal customer.