VERY POOR response on a *****ENENT CONTRACT

VERY POOR response on a *****ENENT CONTRCT that was included on my MTN ACCOUNT which I am continually being billed for - this since March and nothing has been done about it. This after numerous calls to 135 and visiting 2 stores and head office. I am still being billed for this ********** contract (ref ***). Would someone from MTN please contact me and shut this contract down. The last bill for April was R4,695 - why can't they close it for Pete's sake instead of letting it build up a huge amount on my account where I am billed!? I am fed up and will NEVER take another MTN contract EVER!!!