STILL...SOMEBODY PLEASE HELP ME!

I have been battling for months to get refunded for data not used by me. I have a WIfi hotspot andI was being charged for ringtones for phones etc. I complained on here and got a reply from MTN that they would look into it. Still no joy. Wrote to the Mall of the South store owner Willem Loots who never got back to me after saying he'd investigate. Emailed him 3x after that. Changed my contract to capped 3Gig R109. Was till constantly running out in a couple of days. The store said I could cancel my contract end of Sep. Tried to do that and I was told it's February. A lady on sales helpline helped me - Mrs Pillay. She changed me to R149 3Gigpm. On the 17th, I turned on my Wifi with my apparent new 3 Gig and after an hour of email and 1 download, the whole 3 Gigs was gone! This is constant *******. I have checked and I am not subscribed to any services that charge fees. If something doesn't happen asap, I'm going to the small claims' court!