MTN A BUNCH OF ******

MY CONTRACT WITH MTN HAS ENDED(R117.0 PM), TRIED TO UPGRADE, BUT MTN IS ONLY WILLING TO HELP WITH A CONTACT OF R135.00 PM. NEXT MOMENT THEY CHANGED MY MONTHLY PAYMENT TO R159.00, WITHOUT A NEW CONTRACT, CANT HELP WITH A CONTRACT FOR R159.00 PM, BUT THERE IS NO PROBLEM TO JUST DEBIT ME WITH R159.00