cancelation

I recieved a tablet from Cellc and the second day I want to the cellc shop as i realised that the smart card and the front camera was snowy. I tried the same tablet at the store and the pics were perfect, I called the call center to advise that the cemera was not working and I was advised to stop using the tablet until it is fetched brought in for testing. I am still waiting tioll today, the last call i made I was advised a turn around time of 7 days and it is 8 days nothing is happening.<br> <br> I think cellc did thid do that I can be stuck with this tablet that is not working, I called today and Iwas transfered from one department to the other. I want to terminate the contract without paying anything extra as cellc has failed to fetch the decoder. last call refrence is ***