Bills after Cancellation of Contract

Hello Peter<br> <br> MTN acting *********ly and doing business as usual disregard my request for contract cancellation which I request after expiry of my full term of the contract on the 21st of April 2015 with reference number ***. I clearly and explicitly requested termination of my contract on the 21st with the given ref number and also send an email. With this request I asked that my line be changed to Pay as you Go which they did. However the problem is, they only changed the price option, they continue to give me airtime worth r210 and billing me r245. My argument is not about the costing of the product, but rather they disregard my request for cancellation and changed the pricing option without my approval ripping me off. Clearly, MTN is unwilling or reluctant to completely terminate my contract as per my request to just further enrich itself at myself, which ********* and mischievous. I never asked for airtime to be loaded on my phone, I never agreed to receive airtime and billed? why are you doing so? I am terribly inconvenienced and jeopardised by this unbecoming behaviour which I can only perceive as capitalistic, untoward, misdeed and unprofessional.