POOR SERVICE IN RESOLVING A BILLING ISSUE

The debit order for my cell phone account did not go off at the end of January 2015. I subsequently made a manual payment on the 09/02/2015 but this was never recorded by MTN and as a result MTN keep on deactivating my phone. I have phoned (808) and emailed their customer service people and the collections admin dept. on a number of occasions, sending proof of payment and every time get a promise this will be resolved, but still every month this issue crops up. Clearly they have done nothing and in the interim I am inconvenienced by my phone being deactivated. They have suggested I make another payment to ensure my phone stays online but I refuse to do this as I am of the view that I will never be reimbursed. It is now 2 weeks since the last deactivation and I have no Joy in resolving the issue. Whoever managers the customer service and Collections department needs to be fired given the shoddy service that I have received. MTN will not be getting a contract renewal from me going forward.