Uncapped data contract not capped

Dear Mtn Centurion Mall,<br> <br> In December 2014 I got a data contract at your store. As I do not like surprises at the end of the month, I communicated with the sales person (Pule) that I wanted a capped contract. The deal was for 2Gb during the day and 2Gb at night. Pule explained to me that the 2Gb at night would not be valid if I wanted the contract capped and I agreed with this. <br> <br> Whilst doing all the admin for the contract I told him several times again that the contract must be capped (up to the point that he actually got a bit annoyed with me) as I don't want to pay more than the 199 rand per month for my data.<br> <br> After an ankle surgery I had to work from home for a few weeks and I used my data device for emails and research online. To my surprise I had a bill of almost 3000 rand that was taken from my account this month (more than 15 times what I am used to and supposed to pay). Turns out the contract had not been capped at all.<br> <br> I am not willing to pay this amount and would like to ask for a refund as it was a mistake made by one of your employees.<br> <br> Hoping to get a response and a solution from your side!<br> Kind regards,<br> Fieke de Jong