manger apologises, staff remain rude to me

I went to a Vodacom shop nearest to me to enquire about buying the Vodacom powerb10 tablet. After having placed the Oder I realised I didn't have a proof of residence so I started asking this lady by the name of Pam what can be done if I don't have proof of residence can I buy just the tablet without a sim card due to the fact I was working long hours so I couldn't go and get one. She did answer my question very rudely thou. Tue next day I go back to the shop and tell her that \ Pam the way u responded to me yesterday was rude"then this male assistance next to her by the name of Bradley asks me to tell him what Pam said that was and I responded to him"