Poor communication

I am very upset and disappointed in this companies poor response and communication towards their clients. I've tried getting in touch with them via email as well as the number advertised by them. I tried paying my wifi since the 1st of November but every time I log into my account it always shows there's no amount on the internet to pay for but the company sends me statements every day about my overdue account and just adds more money to the amount I was suppose to pay. This is not unacceptable !