Munnik Basson Dagama Annoyances

Rudest and *********** call centre agents, about 3 years ago I paid up my Cell C account, I had set up a debit on my accounts and had completed by the given 3 years and even exceeding it by a further 3 months, called Cell C to cancel my contract and they eventually did 2 months later after many calls, they even sent me a cancellation confirmation once I had sent them proof of the payment they claimed I missed, I then continued sent this confirmation to MBD to which they still kept calling me, they finally stopped for 2 years and now have restarted their harassment campaign. The call centre staff aren't capable to relaying this message, I have even tried calling them to speak to a manager which they have blatantly refused or put me through to a line that ends up cutting off, they even harass me on my work line, the next call I get from them, they'll be served with a summons by my laws, they can play footsy together.