No customer service or help

I upgraded my contract. I needed to do a sim swop and then Telkom \lost"my cell phone number and cant seem to get it back. My sim ceased to work on 19/10/2015 at 12:00. It is my business phone and since then I have had no means to contact my clients by telephone or for them to contact me. I am therefore now suffering a loss of income. The manager at the Kollonade Telkom store does not seem to want to help me. I very urgently need my contact number back. I just need them to take this matter seriously and see it from my point of view. """