Being billed for non-existent services. Called 3 different occasions and was promised that I would not receive additional bills.

I cancelled my internet and mobile services Dec 2025. I continued to receive bills jan-march 2026. I called customer service and had the charges refunded and was told future billing would not occur as they confirmed I had my services cancelled per my request in november 2025. I continued receiving monthly bills of varying amounts. I called again in June and was escalated to a supervisor who promised me that the problem was resolved and 'guaranteed' that would not continue receiving charges. I received a refund for some of the months but STILL continued receiving bills. I spent 47 mins on the phone the 4th time I called and was promised once again that the issue was resolved and furthermore, my account information had been deleted and removed so that I would not continue to receive charges. Each of the times I called, I was told by the xfinity mobile agent that they confirmed I had no active services and that I should not be receiving a bill. Spoiler alert, I am STILL being billed. I am unable to remove the credit card on the account. I need the billing to stop and desist. I work in critical care and do not have the bandwith to spend ~45mins on the phone with customer service every 2 months. 

Please help! 

Most recent customer service confirmation #[Edited: Personal Information]