Early termination fee

My son had the xfinity account in his name and lived with me.  He moved out and I didn’t need the same level of service and wanted to change the account to my name.  I spent over 10 hours on the phone with xfinity agents who all gave me different advise with two of them telling me they would call me back and never did.  I went to two different xfinity stores five times with no result. After not having internet service for over two weeks (because they threatened to charge me if I didn’t turn in their equipment) and being put on a fraud alert by xfinity I finally had a new account. Now I am receiving notices of an early termination fee of $110 …. at my address but addressed to my son under his account number.  I now understand that a contract can be downgraded in service with no fee charge.  If any agent had explained this to me this would have been so much easier.  I would like this early termination fee dismissed.  The last agent I spoke with told me she would send in a complaint and I would receive a response by email in 3-5 days.  This never happened.  Again, I would like this ETF dismissed.
can someone at Comcast/Xfinity please contact me?