MTN - FALS CONTRACT RATES ADVERTISED AND CHARGED.

I UPGRADED A FEW MONTHS AGO WITH 3 X CONTRACTS. THE ONE CONTRACT WAS SIGNED AS R749.00 PM AND MTN HAS BEEN OVERCHARGING EVERY MONTH AT R790.69. A QUERY WAS LOGGED AFTER THE FIRST MONTH AND THEY SAID IT WILL BE RESOLVED AND THAT I WOULD GET AROUND R100 CREDIT BACK. THE NEXT MONTH THE ACCOUNT ARRIVED AND I WAS CREDITED WITH R18 ONLY. I TOOK IT UP WITH THE STORE (EASTGATE - SIMPHIWE) AND HE ADVISED THAT HE WILL SEND A REQUEST AGAIN. THE AMOUNT IS STILL BEING DEDUCTED INCORRECTLY AND NOTHING IS BEING DONE TO RECTIFY THIS MATTER.