Incorrect contract

I'm writing this review behalf of my husband. Yesterday we went to Mtn columbine Square in Johannesburg to get a business upgrade. Simphiwe Makhubo assisted him. The phone was R699pm in the book for 24mth . He then said the price was R529.00pm for 24mth and he confirmed with him a few times just to make sure. Our papers also states 24mth contract. Now we check on my mtn and it shows 36mth contract. This is such pathetic service in SA seriously now mtn better fix this because it's an inconvenience to us to come back to the store as we don't live in that area and unfortunately it was the only store that had that phone. Mtn you should train your staff daily so things like this don't happen especially to some one with a business contract. You guys are too quick to make a sale and take our money.