I Got a month to month data router

I Got a month to month data router. I wanted to change my debit date after the first installment went out .I was told it'll be changed and for two months it wasn't. I called last month to request again. I was told the debit order was cancelled because of the rejections. I then was told to make a deposit the moneythen I can change the date. Made the deposit called in I was told to call in 2 weeks later to change then date but they'll load the data so long .but then the data was not loaded .I called again they told me my account was sent to their legal department to contact them for help I have to call them, stayed on a waiting line for an hour. I then called and emailed customer care again a day later, them I'm told the legal department does not have a phone . I was given a email address to contact them . It's been 10 days and they still haven't said anything. Customer care says they're back logged but an email to stay in the inbox for 10 days The issue is still not solved.