7 months to transfer deceased contract and still messing up

Patience running thin. It took 7 months to change my deceased father's contract number into my name. Multiple visits to a store, numerous incoherent MTN requests, over 100 SMS sent for no purpose whatsoever spamming up my device, after a ream of paper sending the same info several times and two tanks of petrol later: success. His number finally became mine.

...And now I'm being debited from my bank account twice.

Peak level frustration and this is a top 100 SA company? Time to port elsewhere.