BP Garage Meadowlands next to Mzimhlophe

I went into the garage with a WI code that I got from Vodacom, wanting to buy an item and top up. They told me that their till is not activated for codes, which is totally bull****. Both the cashier and manager said the same nonsense. I normally use these vouchers at other BPs and have never had a problem before. They undermine people. Please get this issue sorted.