Terrible service and insane prices

We are currently paying over $150 dollars for internet. This is an extremely high amount compared to others in my area and other providers. We were previously in a contract but once that contract ran out, the price jumped through the roof. I am constantly getting ads in the mail advertising internet starting at just $25/$30 dollars a month. I went onto their website and shopped the available deals in my area. I was able to get the same internet speed I currently had (400) for only $65 per month TOTAL for 24 months. This included a xfinity modem+router combo that was $0 per month for 24 months. I called xfinity to take part in this and the experience was terrible. At first after explaining my situation, the call was dropped and I did not receive a call back. I then had to call again and wait in the queue again. Once I was able to again explain my situation, I was told they could lower my bill to 120 something. I asked multiple times why i could not get the available internet deal that is advertised on their website. I got inconsistent stories as to why I couldn’t. First I was told that there are restrictions that apply and it was not available in my area or at this time. I explained that it absolutely was as I put in all my information and this is what their website told me. I was then told that this deal was only available to new customers not existing customers. I understand if I was in a set deal contract already however my previous contract has lapsed so I do not know any reason why I could not take part in this deal. I asked the representative many times how it was fair that I was a loyal customer for over 3 years now and was having to pay over twice what they were advertising for others. I was shown absolutely no value for staying with the company. I ultimately asked to speak with a supervisor as I was very frustrated at this point. I was told that it would take a while for one to be available. I waited about 15 minutes and then asked if a supervisor could call me back once available. I was told yes this was fine but it would take an hour or so. I said thank you and moved on. That was 2 days ago and I have not heard from someone since. I am appalled at the service that I have received and my bill is still over $150 dollars a month.