Can't access my Xfinity Mobile Account

Initially, I had my mobile and home internet linked together.  My home internet was post paid.  Recently, I changed my home internet to pre paid.  Now, I'm not able to access my mobile account.  In order to have Xfinity Mobile you must have Xfinity home internet post-paid.  Every customer service representative I called say I don't have a mobile account, only prepaid home internet.  I can't log in my mobile account online or on the app.  Online says i don't have a mobile account, which is the same thing every representative told me.  But I recently got an email stating my mobile billing cycle ended and auto payment will be charged on my debit.  So, I need help accessing my mobile account. Having pre-paid internet messed up the system somehow.  I would like to transfer my current phone number from xfinity mobile to another service since i can't have it linked to prepaid home internet.