Service Suspended 3 days in a row after payment was made

I don’t know what to do anymore. I am likely going to cancel my service and go with Fios. I signed up for the deferred billing plan in August and after an initial payment my services were suspended the following day. I had to pay another $50 when I shouldn’t have. Apparently that shows as a broken arrangement. I called last Thursday asking for an extension to October 28th and the agent set it up. Then my services were turned off on Saturday morning. I spoke with multiple employees AND managers who said that there was nothing they could do, it was computer generated and they needed a payment of $62 to have services restored. I finally asked for the Loyalty department because I was going to cancel services if this didn’t get resolved. One of the employees credited my bill $60 and I paid $2 to be able to have my services restored. He also looked into the issue in August and said there was a glitch in the system. My services were restored promptly. Yesterday my services were disconnected again. I called again and the representative acknowledged that I am on the installment plan and this should not have happened, and they’ve been having “technical difficulties.” My service was once again restored. Today, just now, my service was suspended again. Additionally, I noticed that I was charged a total of $18 to have my services restored in August when it was Comcast’s error! I would like this resolved once and for all, my services restored, the $18 credited back to my account, AND compensation for this current trouble. If I don’t receive a permanent solution I will cancel my service permanently and go to Fios which has much better customer service. You will have lost the ability to retain a customer of over 20+ years who pays over $250/month for bundled services. Also, I have just come out of the hospital. This is not OK.