Worst Billing Service

I had a contract with them(month-to-month at that) for a data deal(40GB+40GB) that I soon cancelled because of a personal choice really.

I was patient enough when they took 2 weeks to respond to my initial request to have the contract cancelled, which not forced me to go into an additional month paying them for the service(while paying for another that I took up) but now I see that I'm still getting billed even though my contract with them ended in September(the last bill that I paid so that my account could be closed)

Mind you they don't have post-paid options whereby I could've ranked up data usage post what was allocated to me, and I did mail them to ask them about the account but I've yet to receive a response on the 1 email account that works while the other bounced back