will not transfer data

I bought data this morning but we made a mistake and entered one digit wrongly of the new number. We quickly phoned the customer service, but the lady who spoke to me and her team leader refused to assist. Told me vodacom does not do data transfers. But I have proof that i made the payment, and any other institution would have assisted me gladly, because they understand that people can make mistakes. Vodacom sees it as a way to ***** even more from money from their customers. I know we are not the first that has gone through this, and we will not be the last!!!