MTN Contract Holders Beware of huge Bills!!!

I am an MTN contract holder. My contract came to an end on 1 March 2016. When I received my March Bill it was R2058,15. Due to the Bill being way too high I decided to cancel my contract and called the call centre. The reference numbers are *** and ***1 for retention. On the 24th of March I received a call from Angela Mkwa**** who confirmed that they had received my request for cancellation and they were going to cancel the contract. The reference number for the call is ***. She indicated that I would receive a message notification. The process would take up to 2 days depending on the network. On the other hand MTN agents have been calling me to request that I renew my contract. Today its 1 April 2016, my contract has not been cancelled. I have not received any message cancelling my contract. Getting through to the call centre is a nightmare in itself as sometimes I was having to hold for over an hour and the call sometimes cuts off before I even get a response. I am disgusted by the way MTN is conducting its business. I find this very *********.