Pathetic Service

I've taken a contract a few years back in which came with 2 extra free SIM cards totalling 3 Sims. I cancelled the contract last year (2017) July in which I requested 1 of the 3 Sims cards to be changed to pay as you go. 2 out the 3 Sims was cancelled but the 1 that I requested to be changed to pay as you go has not been cancelled and till date I'm still paying a monthly premium for a simple that was free. I cancelled this sim card 4 times. Twice at walk in branches (bluff & Chatsworth) and twice through the call centre. I went to the bluff branch last week to cancel again at the & waited in the long queue for over an hour due to them only having 1 consultant on duty with my driver's license. I was told that it could only be done with an Id and not license. I then go back the next day, waited once again for over 45 minutes and I was told that cancellations can now only be done over the internet. I've been ********** for so long and it's costing me more & more time and money driving up and down. What a headache.