Cell no changed without authentication

<p>I ordered a new contract fone via the internet. I received it last week and only to be informed that my no has changed. Never did I gave anybody the authority to give me a new no. Now I've been struggling for a week now to get anywhere and have the contract change to my original no. The query was logged on the 24 June and phone 3 times already, whe I was told it's marked as an urgent issue. They want to charge me R250 because somebody at Cell C desided that they change my no. I checked the order approval and see the the no on there is my original no. </p>