Call Centre seems Faulty

I recently lost my phone and need to blacklist my phone ASAP.<br> I went to a branch and they informed me that they could not blacklist it from the branch (not sure why this is?) and I had to get hold of the call centre to do it.<br> <br> I have tried calling various numbers but the main one is 0831 808 (as I am calling from a Telkom landline). It asks me to enter my cellphone number, which I then do and follow it with a #, the automated response repeats the number and asks me to confirm that it is correct and press 1, which I do. It then says that it isn't a valid MTN contract number and loops back through to me entering the number and confirming it is correct and then it repeating that it isn't valid and then looping again. <br> <br> This is really irritating and frustrating as I need to have it blacklisted and I need to provide the police with the relevant details so that I can claim from insurance.<br> <br> I have sent an e-mail to the customer care address in the meantime, however it will most likely take a couple of days before I get a response.<br> <br> This is rather urgent, please could someone from MTN get hold of me to sort this out.