Phone Blacklisting

Good Day on Thursday morning around 7:45 am my phone displayed 'No Service' initially i thought it was a network issue and i didn't pay it any mind. but for the whole day my phone didn't have network and when i went to the Vodashop they said it was my sim reader. the next day i went to another Vodashop and was told that my phone has been blacklisted for bad debt. I called the accounts and billing department and the agent confirmed that my account was up to date and there is no reason why my phone should be blacklisted. I spent the whole of Friday trying to sort the issue out with no success. Firstly this phone (Iphone 5s 16GB) is not under any contract and i do not owe anyone for it, my contract with Vodacom is on a sim only contract. I called Cell C, as that's who i had gotten the phone with and they informed me that they wouldn't have blocked/blacklisted my phone because it was not on their network. I have sent through the forms to the un-blacklisting department and called the call centre a million times and my situation is still not sorted - 6 days later.<br> <br> Please can someone tell me how to sort this issue out. Office Line: *** (i don't have cellphone access)