After 4 Weeks still no answer

I app**** for an upgrade on the 17th of September 2015 at the Highveld Mall Telkom Mobile Store. I gave the Sales Executive all the necessary documents in order to do process the application. After a week, I contacted the store and I was told they still do not have any feedback for me. After the next few days, I heard nothing from the store. I contacted them again leaving countless messages as they were offline. I contacted them another week later, the sales executive had no idea whether he had sent in the documents or not and 5 days later I have still to receive my feedback. Pathetic client service!!!