Contract cancellation not actioned

I phoned the call centre on the 12th May to cancel my contract which expired on the 05th May. I managed to get through to the call centre and was given the ref number ***. The gentlemen who assisted me told me that I will be migrated to prepaid in 3 to 5 days. I was also informed that I will get an sms notifying me of the migration which I haven't received to date. I attempted several follow ups to the call centre but never succeeded since it's extremely difficult to get through to Mtn call centre. I then sent emails to [Email Removed] No sms no one responds I am frustrated...Mtn please cancel my contract urgently<br> <br> <br>