Contract Cancellation without Permission

I have an LTE Sim contract that was cancelled due to the unavailability of LTE network where I stay half of the month. I called in to be assisted with this and I was told I will be assisted to migrate to a different package (normal data contract). While waiting I received a message that the contract has been cancelled. I called the Cancellation dept and was told cancelling is just a process they take with all the contracts and then I can call Sales department to get a new contract. I called the sales department only to be told I am not able to take a contract because I am under dept review. My issue is I had a contract which I was always paying on time and it did not need to be cancelled, instead it should have just been changed to a different package. I am using this data for work which means now I won't be able to work without it. I already have other two contracts with Cell C, but in this rate I might as well cancel them too.