MTN - THE MOST *********** MOBILE COMPANY

My MTN contract expired on 01 April 2017. I called many times to cancel it but they were explained that I will loose my free minutes..and bla, bla, bla... just wanted to keep me longer, charging me in the mean time, and to void cancel the contract. Anyway, I've asked in writing, REF ********** 1, as from 16th of May to MIGRATE from the Contract to pre-paid and KEEP my number. On 01st of June I've been billed again, and PAID for another month. But on the 01st of June my number has been DELETED....and I had NO SERVICE at all from MTN. All my struggle to get my number back was unsuccessful. I lost a lot considering that my bank had that number, my business contacts have the number and they couldn't contact anymore...and so on. But, the deduction never been cancelled... every single month they are deducting my account...without my permission. I am keep on phoning customer care and trying to sort this problem but nothing helps. This is really unprofessional, and frustrating. Please advice, when and where I can complain about this issue and how to solve it. STOP DEDUCTING MY ACCOUNT!