Request for data bundle not working, takes money

Sometimes when buying a data bundle from vodacom, a message is given that states that a request has been sent for the data bundle. Airtime is taken, and then nothing more. No data is given... and the transaction is not rolled back after failing.<br> <br> This has happened to me and now to my girlfriend twice.<br> We are moving to CellC. <br> Vodacom is skelems.