Worse ISP!

Your service sucks, for the past 3 month I have been trying to update my banking details and debit order date but to no avail. And everytime they tell me it's going to take a month to update which I was not aware of to begin with. Now I'm being debited on an account that doesn't have funds. The last call I did was even worse due to the consultant not knowing what she was doing and for a cheek she muted me twice and dropped the call. Worse service delivery and this is not the first time. I tried canceling my debit order to make manual payments but that is also an issue. I need a solution because my bill is increasing to no fault of mine and my bank account is running into a minus that's to YOUR inefficiency.