unresolved issue

Hi<br> <br> About 2-3 months I lodged a complaint with Hellopeter about a R12000 wifi account. To date there has been no resolution and to date nobody at MTN has attended to my query. Subsequently I sent them emails to which I have not received a response either. This month I have again received an account to the value of R5000 for my wifi account. I want to know how there can be data usage billed onto my account if I have stopped using the sim and the wifi device in January this year already. Where then is the usage coming from? Can somebody please help me to make an appointment with a consultant who will be able to investigate and assist as the local MTN shops are unable to assist whilst the problem continues and it is now 7 month later.