Vodacom - Customer service non existing.

Having trouble with data dissapearing. Top up our data on our ****le just to have a message 5 minutes later stating we are out of data. Went to Vodacom in Vredendal to get help. Asked for them to check where the data we bought went. We could give them exact time we bought the data and exact time it was gone. They refused to help... said no one can tell us what used the data or where it has gone..... how is this possible. So now we have two ****le contracts with 5 gig each. It doesn't even last a day and it is gone. We do not watch videos, we use it for basics like email and banking. We top up with 500mb at a time. 5 minutes it is gone...... so now we can't use our internet and we are still paying the contract with no one being able to help us determine where the problem is???????????? Customer service disgrace.