Irresponsible and unprofessional service

In July 2014 I went to Vodacom to blacklist a cell phone I had with them on contract and to soft lock the sim card as the phone was ******. Vodacom informed me that it was done and to re-open it a password would be needed. HOWEVER, the next day the phone was unlocked and in use by the person who had the phone. In October 2014 I've wanted to do a sim-swap on the number as I wanted to use the number/contract on another phone. I was amazed to learn that the number was in use on another phone although VODACOM was instructed by me to blacklist the phone and block the sim. I had to pay for airtime and data in accordance with my cel contract but it was used by someone else. As this was not my fault and as I did not authorised Vodacom to unlock the phone/sim card I feel that they should take responsibility for the cost involved i.e. airtime used and data.<br> <br> The matter was again reported to Vodacom is April 2015 as the phone and sim is still in use by someone else. I have opened a case of *****/theft at SAPS - CAS 613/4/2015 and it was also reported to Vodacom's ***** unit - S3-82C3U-UST60. I want a refund / cancellation of the contract to resolve this matter.<br> <br>