Disgusting service ever

Im so disgusted from the service i received from pick n pay family in Giyani, cashier is Gavaza Mabunda and the supervisor i dont know her name she didn't have a name badge, i told the cashier that i want to load MTN Momo of R50,00 she was lost with an attitude at the same time she didn't know what is MTN momo and she was not interested to know what is it she just told me that they don't sell momo, i asked her to call supervisors because is not for first time to buy it at pick n pay, she called her and she also came with the same attitude because when i tell her that i want to buy momo she told me that they dont sell it, when i told her that is not for the first time to buy she showed me a screan with airtime for vodacom, so when i told her that is MTN Momo where i deposit money she just opened the screan where i saw momo so i told her that is this one so she told the cashier to load it for me, where the cashier didn't know how to load it and the supervisor was already gone i dont know where to so u ended up leaving the store without buying my MTN momo, pick n pay please train your cashiers to know what you are selling and what you are not selling, supervisor attitude is controlling her because she is the leader she is talking to the customers the way she like, i dont think i will ever set my foot in your store pick n pay giyani their service is disgusting