Xfinity - I closed my account and still got charged... been over a year and still no update

Hello, I have been receiving text messages from a debt collector (Sunrise) for some weird reason... I canceled my services with you guys well over a year ago. I was charged for internet services even though I did not live there and had cancelled my account. I contacted you guys about it twice after the incident by phone and text, and you said you would handle it. When I did cancel my service, the customer support person told me to take off automatic payment to make sure that I did not get charged as well.

The total charge on my account is $170. I told them to cancel my service on June 13th, 2024. They sent me a verification through email that they are working on it. Of course, the following month, I got charged the internet service fee even though I canceled it before the billing period. I saw other posts in a similar situation as mine where the agent told me the balance would be taken off. I have called them 3 times after this initial incident and waited hours and hours for the customer support to look through my account and review the situation. I had a customer support person argue with me that I have to pay it, while others said that they will handle it and that I will receive an email about what happens... 

A bunch of liars. 

I even resorted to using the text support on their website to do all of this, but it took way longer because they kept changing representatives... "let me look through the previous messages"... sure. 

The last representative that I talked to told me that I had canceled my account cancelation request on June 13th, 2024... Why would I do that? LOL I told them many times that I am moving and will not be needing their services because the new apartment that I moved to uses a different service provider. 

I do not want to pay these charges because I feel like it is not my fault at all , and I honestly do not know what to do about it. I need to speak to a complacent representative that has common sense who will not lie about what they will do for me.