Cancelling mobile

I've spent the last two days trying to cancel my Xfinity mobile service. Not only did they not cancel my mobile service, they talked to me into a 12 month plan for my Xfinity home Wifi. She kept telling me to hold on. It would take a few minutes to cancel my mobile service and in the meantime, used her sales techniques to sell me something else. Once she got back on the phone, she said I could not cancel it there that I had to call assurance and gave me that phone number. I called Assurant and they don't know what I am talking about regarding canceling mobile services. At this point, I think I'd rather just cancel all Xfinity services despite being a member for 10 years.