Bad Services and Ridiculous Belling..... Just cannot give me what i ask for

For over a month i have been fighting with MTN, they take days to respond to emails 809@ and they never answer what i request!

in June i was billed for over R5000, of which calls was about R1200 (which is excepted) but the about R4800 for data!!!! Ridiculous.... so i requested an itemized billing and a URL report to have a look what was downloaded or what the data was used for... but strange i cannot tie whats on the itemize billing up with what is on the URL report... so why am i paying for this. spoke to one of their call center agents and discussed this, she then said no you have then been incorrectly billed you need to email ********** and state this and they will refund you.

this is just a never ending story, all i get back from MTN is, you have been correctly billed! tell me MTN what have i downloaded or what was the data used for? this was my question in over 10 emails.... they just never answer!

Every network has theirs issues, but MTN are ripoffs!!!! i have requested some call me back, this never happens!

what do i do next, because MTN is clearly not interested!