Very Poor Service

I have been trying to get hold of MTN's Customer Care Centre since 6th of May to obtain my Itemised Billing. Their call centre number would not connect me to a Support Consultant but kept providing with my Account Balance. I resorted to using their Contact Portal on the internet to log my query. I must have logged 8 queries over 12 days and never ever received a reply. I resorted to cancelling my contract on 18 May. Fortunately I managed to get through to a consultant for the cancellation. However, it is now 1 July and I am stilling getting MTN debit orders going off my account without receiving an invoice and again the Customer Care Numbers goes into a loop and I cannot get to speak to a Consultant to understand why I am being billed after cancelling my contract. This service is extremely poor and disappointing.