MTN contracts still being billed despite cancel

OK, After MTN telling me that they have sorted out the contract (REQ:***) today I get a SMS stating that I owe over R1000 now on contract which was ported in April 2015<br> My first deduction is for this contract was in 28 March 2013 DEBIT TRANSFER MTN SP A****** R893.98 and April 2015 they took off the final payment for my contract 30 April 2015 DEBIT TRANSFER MTN SP A****** R898.98 I have fulfilled my 24 month contract and ported to Vodacom. Now 29 May 2015 they deduct R651.00 for a service not rendered. this was reversed at the bank. then 30 June R997.90 for services not rendered. I have fulfilled my 24 month contract and canceled in due time despite your strike actions and poor service. I feel legal action and consumer protection act is my next step. Please contact me telephonically so we can stop things from getting out of hand.