I cannot cancel a paid up contract!

MTN is making it extremely difficult for me to cancel my two contracts that I have paid up for the past 3 months now!<br> <br> Both contract are paid up, 24 months were paid up. Whenever I go into the Secunda branch they are on the phone with the 'call centre' but they are online for 2hrs straight. I cannot leave work everyday to sit there and wait. To date I've been holding on for the call centre for nearly 5hrs in total! This is ridiculous. When I finally get through they tell me to go to the branch...BUT...when I get to the branch they tell me to call the same call centre number that I've been calling...and then they call it themselves again!!!<br> <br> Its been 3 months, I've told them I'll stop the debit order as I don't want the airtime anymore and I've tried to the best of my ability to cancel the contract as its finished...they tell me they'll black list me...they are quick to black list but slow, very slow to cancel the contracts...<br> <br> HELP anyone in MTN...its simple, I paid for your service and phones for 24 months as agreed...now its finished, now end it.<br> <br>