Hi,my daughter had a telephone conversation with an mtn consultant to upgrade to an data and voice contract

Hi,my daughter had a telephone conversation with an mtn consultant to upgrade to an data and voice contract.The consultant clearly indicated an amount for a 2 year contract as R109 with 10,5 GB and 100mins per month.She got her 1st debit order and it was R208 with only 6gb.We phoned the call centre to query this and they sent us from pillar to post.Her phone number is ***