MTN ******

i would like to express my great disappointment in MTN, TO MENTION IV BEEN A CLIENT OF THEM FOR MANY YEARS, i took out a upgrade in November2021 with them for a double deal of R499. Dec 21021i received my 1st invoice, where they billed me for 2 devices and i have to pay the VAT AMOUNT also, 1st time that happens . went in store to query invoice they assured me was fault on they side and will be sorted and will be credit for amount over paid, they log complain, its now January got new invoice and they are still billing incorrectly.. i have personally logged 5 complaints with they call centre consultants until today no resolution