Bad service

I called on Sunday and I spoke to a lady named Nelile and I explained my problem to her.... I was charged for data that was put in the sim card.. But on my side it says the sim card is Ricabud ...i went back to Mtn and asked them to help me several times but they couldn't... So when I called Nelile helped me and gave me a ref Number............. I called today which is(Friday) I spoke to Portia trying to explain my problem coz they said I should call today and they will give me feedback but Portia was rude I ended the call.. And called again and spoke to Anna she was the rudest of them all she spoke with an attitude so I asked her to transfer me to the Manager (Melony) she's just the same as them, she doesn't deserve to be aManager......And right now I'm thinking of taking back the device to the store... They not helpful at all