Horrible customer service

I went to Pick n Pay at Spring mall today around 5, i wanted to buy grocery for me and my sister when i have my sister child who is 10 years old so when i get to the till i used my sister card to buy her groceries first as am done paying with her card , i try to buy my own with my card but my card was not showing on the Pos for which she even damage my card worse by spraying it with Sanitiser so i went and try ot with different banks it could not withdraw or display in screens so i went and took my phone to do a cashsend as i come back to the store with money i found my young sister who is 10 years old outside the store when i asked her why did t her she said Zanele Mthombeni chase her out of the store because she have a child to take care of at home.... I dont know what i would have done if i did not find my sister or what i would have done if she was ****d, I had a bad day....Pick n Pay Zanele Mthombeni i she should have just told me to leave and ho but to other store than to agree with me to go withdraw while knowing she will let my younger sister go out