TAX INVOICES AND STATEMENTS

Our company has four cellular phone contracts with MTN. Since March 2015 we have not received any tax invoices or statements from MTN. We have a monthly debit order and MTN has no problem with payment of our account. We need the tax invoices for monthly allocations of the telephone accounts and obviously for our VAT records. We have tried to register for online services, we have phoned and emailed with no response. When we phone in we have to hold for long periods, get transferred to different departments and eventually we are given the email address of the credit controller. We have requested MTN to send the reports on a monthly basis or assist us with their online services so as to obtain the invoices and statements ourselves but with no response from them. The only response that we have received, is automatic replies saying that they have received our complaints and will come back to us, which never happens. Please assist with this really bad service.