Vodacom poor accounts service system in place

I purchased data by mistake for my number instead of another number via my vodacom profile. I have a vodacom contract. I can't transfer the data to other numbers and vodacom says that they can't do a reversal. I am liable for this purchase of R449 (100gigs) as I use dmy work's credit card , data that I am not going to use at all because I have sufficient data and wi-fi at hoem and at work.