MTN shocking Service( second negative review)

I still await feedback on a credit due to me, having been a client with MTN for over 20 years , I am disappointed in the service received, I initially renewed my contract with them only for my upgrade to be cancelled without my permission. The consultant called me numerous times to obtain information only for me to find out that it was cancelled after enquiring about the handset. I as the customer had to call the courier company to find out from them that there was no order number. I also couldn't get through to anyone at MTN after being transferred multiple times with agents advising that they are either not in the upgrades department or not able to assist as they only work on the prepaid side( considering the way the world is moving I would assume multiskilling staff to work across platforms and product offerings in order to improve customer experience) anyway, to this day i still wait for my credit after cancelling my contact. I was in contact with someone from the MTN twitter handle and then a lady from the complaints department mailing me for information about my debit order which if I should mention was double debited in December. once on the 1st and one on the 15th. This is also the second Hello Peter review sent on the matter and still nothing. its been well over 3 weeks now so honestly not sure what else to do?