BAD SERVICE

I renewed my contract with Telkom after a month the device they gave me just went blank and when I phone the call centre the agents told they are not working with devices so I went to Telkom store for a repair they couldn't assist me just because I didn't have the delivery note with me , I phoned the call centre again they took me pillar to post without helping me, the contact number for the providers they gave me they could not recognise me on their system, am still stacked with the useless phone and what annoys me is they will deduct my money but failing to provide good service to their customers