sony ericson cell phone - 2nd time in repair

I took out a contract with Sell Direct / telkom mobile.<br> <br> my cellphone went the first time in for repairs and i waited long to get my cellphone back, when i got it back i had the phone 1 week then it gave the same problem switching off and on.<br> now for the second time i had to send my phone in for repairs again for the same problem. i took it in 26 oct 2015. still waiting for my cellphone.. i didnt get a spare phone to use while its in repairs..<br> the repair shop in canalwalk which i cnt get hold of them..<br> i want to cancel my contract please im unhappy.<br>