Once again terrible service

I have cancelled my cell phone contract x 3 times, one via email, in June, and twice at the Glocell branch at Balfour Park. I am still waiting for Elton to call me back. Glocell does not have my cancellation document with my ID, it seems to have disappeared. I will have to take time off my schedule once again and go into Glocell Balfour to get this sorted. They simply dont seem interested.