Incorrect debit date

Hi<br> <br> I have a cell phone contract with Vodacom and I usually get debited at the end of the month. For the month of July I was debited on the wrong date and when I called the service centre (***), I was rudely told that I had insufficient funds in my account and that's why I was debited R349 instead of R250. So I insisted that they go through my statements only to realise that they did debit me on the wrong date. I was told to hold the line for more than 20 minutes only to be cut off. I am extremely unhappy with the customer service that I had received and I would not recommend friends and family to join Vodacom because of having such *********** staff working for them!!!! R100 might seem less but take that amount away from 10 000 people and it becomes a lot...