Terminated Contract

I bought a tablet from Jabba in February 2015. A week later it started freezing and switching off by itself.<br> I called Jabba they said they will come collect it. <br> <br> Since then they never came to collect it. I call them every month to come fetch it but all in vain. I called to tell them to terminate the contract because its 4months now I dont use the device. they didnt terminate the contract and they are still deducting money from my account. <br> I want them to come fetch their tablet and refund all my money back.