Contract Cancellation

Hi. I've requested that my cell contract with Telkom be cancelled, and I be moved to prepaid. Contract ends 2 May '16, and I've given them the required month's notice. Request logged on 31 March at the Cresta Mall store. There has been no response whatsoever. I've followed up at the store, no one can help. I've emailed telkom cancellations a few times, no responses. No can help on the customer service line either. Whoever is running the twitter account simply ignores people. Come next month and I'm not moved to prepaid, it'll be my fault. That I never followed up. I'm very displeased with this. One expects correspondence on these matters. (It even shocks me to read other peoples' accounts on the net on contract cancellations with Telkom). If there's a waiting time for correspondence, then let them say so! But to follow-up every day or the other to no avail? NO! I've never been unhappy with the service until now. I don't understand how apart can the store, the customer service line, the twitter account, be from the cancellations department. So much so that none of the can help. Hopefully, my query will be attended to from this. But unhappy, I AM!