MTN Data contract cards offers via phone consultation

Very very bad when they selling a data contract towards you as a recorded transaction they even tell or inform you. Please be very careful as MTN sold a 20GB data package towards me and I even say yes as its on special and i have being selected for this offer at only R169 pm in total cost, now they send me a statement and invoice charging me R330 for only 5GB data day and 5GB at night telling me also the data rolls over when all is nit used on the 20GB deal, the unused GB. Best part is I have not even activate or use the data card at all as yet or installed in a device. Point is what they say and offer you over the phone is not what they provide you with and have informed them to cancel it immediately due to misleading information and agreements after i received the first statement and invoice to pay them. Very VERY poor from MTN AND NOW EVEN SELLING A DATA PACKAGE AT R199 OVER TV AND SOCIAL MEDIA FOR MUCH MORE GB PER MONTH THAN 20GB INCLUDING A ROUTER EVEN AS WHAT THEY OFFERED ME AT R169PM, MTN MUST BE ASHAMED OF THEMSELVES AND WILL NEVER EVER TAKE ANY OFFER FROM THEM.

THANKS FHG VON MOLLENDORF GAUTENG