Duplicate Airtime and bad service

?????????????????????????????? Vodacom was having problems with their network on the 25th and 26th of August so people were getting duplicate airtime. I bought my airtime on the 25th when I try to load it, it keeps telling me that the voucher is invalid the airtime was loaded yesterday by a different number that's not mine. Now they are saying that they can't do anything about it. Woolworths has to deal with it since while I bought it there. I'm so ****ed off cause I wasted my money for nothing