They just taking my money as they please

I have settled my account before the 27th of February and the shop send my document to cancellation department however they were told that i need to call cancellation dept as a customer of which i did call them on the 27th only to find that on the 1st of march they loaded airtime and I called again same day for them to reverse airtime which they did, to my surprise they have just debited my account R373.00 and now I furken busy calling for my refund, I have been with Vodacom for more than 10years but this time they have ****ed me off and I need my refund orelse I'm going to take them very far.