Telkom who?

<p>On the 11th February 2015 I decided to close my business. I phoned Telkom and was told to email my intention of stopping my service to ********** I promptly did that along with a letter explaining my circumstances. (As it seems it is impossible to comunicate with a human being at Telkom) I received my last statement and made payment. I have proof of all of these. Lately on a daily basis I am being harrased by a company that only identifies itself as PSBU and nobody gives a surname only a first name. I have previously been harrased by another company and also sent them my proof of cancellation and payment. When I ask if we can go to court with this case I get a ton of lip from the individual on the line. What must one do?</p> <p> </p>