Not able to pay bill online

I was getting a message that I had to pay my bill in person when trying to pay my internet bill.

started calling arounnd April 14th talked to at least 25 people over the course of 3 weeks with no fix one person said my account had a block another said I didnt. One person removed my payment method for auto pay when I told her not to and she wasnt able to restore it.  I was told to go into store to let them resolve and pay my bill.  Went into store guy told me he restored my banking info and then told me In order to keep my price I was paying for internet I would have to take a zumo box.  We went to pay my bill at kiosik and the machine told me I need to go to a store to make a payment????

Monday May 5th I got to speak to a supervisor well I was told he was didnt get his name but he was rude and raising his voice to me telling me it was my fault I cant pay my bill because I tried to pay with a credit card under the min amount cannpay less then $10.00 so that was a red flag then another red flag because I enter a credit card number wrong into the system. So I was blocked.  I asked how  long the block was I shouldnt have to go into a store ever month to pay my bill since I did have auto pay until an employee removed my banking info. He told me 6months and I said thats crazy then he goes with an attitude it could even be longer then that. All the while telling me it was my fault not theirs.. i been a customer since 1988 and this is how I am treated??   I dont understand why he couldnt lift the block and how come nobody can add my banking info back onto my acct since they were the ones who removed it trying to fix a problem they had no idea what the problem was.  If I couldnt make a payment in the store when i went there then I problably wont be able to make a payment this month either.   I am telling whoever  reads this that customer service is the worse nobody  knew what the problem was and give me a straight answer. If this isnt resolved by the time my new bill is due I will be leaving xfinity and taking my internet and  cellphone service business to a new company.