It is Xfinity trying to steal me?

​​​​My bill was $161.64 an Agent give me a $50.00 discount and now it is $111.64. But it should be $47.50.​​​​
​​​​I need help to solve my issue. My auto pay is scheduled for April 1st, I will cancel it if the value didn't change.​​​​

​​​​On February 14th I got in contact by a chat with Xfinity because my bill was overpriced, At the time it was $82.50. I talked with Anna, and she proposed I change my plan to one of $65 by 12 months, I said that I would only sign it if she could send a technician to change my modem place without charges, and she said that would do it (and I have documented it) as she did, the technician came and made the requested, the change order number is [Edited: "Personal Information"]. ​​​​

​​​​On March 1st I noticed that the price have not lowered and I got in contact again by chat, I talked with Jack, explained to him my problem, and requested the change to be made, he said that the preferred plan was not applied and tried to sell me a different plan. I requested to escalate it and for me to talk with a supervisor, he transferred me to Mansi that looks like was the wrong person, then he transferred me to Sourav, they were not able to solve my problem at the time and created a CR ticket (should be an escalated ticket) the [Edited: "Personal Information"]. And someone should have gotten in contact with me after 24 hours, but that didn't,t happened.​​​​

​​​​On March 1st, Xfinity charged me $82.50.​​​​

​​​​I got in contact by chat on March 3rd and talked with Yalem, he explained to me that the plan proposed to me of $65 for 12 months would not be possible, only by 24 months, and we discussed my concerns about a 2 years plan but at the end, I decide to sign it if they would reimburse the $17.50 difference that I overpaid on march 1st because or an error on the Xfinity system (note that on February 14th I have signed the reduction to 65). this is the Chat id #33112453442213548.​​​​

​​​​On March 10th I saw that my bill was $161.64, I got in contact again by chat, Talked with Harshit, I explained to him that my bill should be $47.50 ($65 - $17.50) not $161.64, he said that could not give me this amount of discount so he could only give me $50, he said if I want more I should call to 800-934-6489 and that would be the only contact way that I could get my problem solved. ​​​​

​​​​I had some personal issues and was only available to make the call on March 22nd (at 09:24 AM - spent 28.24 minutes on the call). The agent told me that he would be able to give me only a $50 dollars discount too but I could call Xfinity again in the future and get another $50 dollar discount from another agent, I accepted it and he told me that in a couple of hours, it should be reflected on the system, something that happened. ​​​​

​​​​I called again on March 27th (at 12:02 PM spent 17.03 minutes on the call), and the second agent on the call told me that he gives me another $50 dollars discount, and told me that in 24 hours it would be showing in the system, it is not 48 hours after it and the value in the system still $111,64.​​​​

​​Today (March 29th) I tried to get in contact by phone or chat and they say that it has an outage in my area and they will not contact me with an agent...​​

​​​​I do need this solved. I'm tired of getting in contact with the worst customer service that I have faced in my 30 years of life! ​​​​

​​​​What is happening? Xfinity is trying to steal me? I just want it all to be solved in a Just and Perfect way.​​​​