Customer Service Non Existing

I don’t know where to start but here you go.  I have been dealing with this issue for over a month now.  Over 4 hours on the phone on hold explaining each time to someone different to get no resolve.  I stopped in the branch in Naperville on Super Bowl Sunday.  I had over data charges on my home internet.  Last year I was going to turn in my equipment.  The rep switched me to a new plan to save money.  I was never notified that if you go over your usage it is 100 dollars.  Where I could add unlimited data usage for an additional 10 dollars.  So I called the number to rep gave me on that Sunday.  I called Sunday, Monday, Tuesday and Wednesday I was finally able to get someone one the phone.  I requested to talk to a supervisor and they said I would receive a call back.  Never happened.  I stopped back in the store the following Saturday and I told them you can’t get anyone on the phone.  I sat in the local store with an instant video with a rep.  I told him I do not want to sign up with a new plan until we get this payment figured out and then I would agree.  Of course it was not handled and they put me in a plan.  I called and spoke to the loyalty department where I agreed to pay the the one charge of 100 plus the two open bills.  He said he would issue a credit of 100 and I said okay.   Following Friday no credit issued and two drafts from my back of 165.  I called back 2/21 and the loyalty department apologized on the recorded line and he would issue the credit to my personal account not my Xfinity account.  I should have seen the credit Monday or Tuesday.  Called back today and nothing.  On hold for 1 hour and 6 minutes and this is after they would call me back so I didn’t wait on hold.  Rep said the supervisor would call me back and nothing of course.  3 hours ago.  Oh not to mention last month I switched the plan and I am still being charged 100 for data usage being over.  Xfinity has worst customer service and totally unfair to a loyal customer.  Way to retain business Xfinity.  Save your reply for the chat that is joke also.