Bad Customer Service

Went to Shop rite Liquor today to buy African Dew which was R89. So we greeted the cashier and then told her we have R14 which is a combination of R0.10, R0.20 and R0.50 of which we usually get from your stores as change so we combined all & decided to pay with them. So the cash immediately descriminated against us and called the store supervisor and continued to assist other customers. During this time, my partner and I are counting the coins again and combining them so it is easier for who ever was gonna assist us. They let us count until we were done & when we done, the store supervisor eventually comes then does not even greet us then, she just dismantled all the coins and started counting them again with an attitude. My partner tried to greet her and found out if all is in order but she was just not engaging with us & gave us attitude. The money we gave her was R90, but she returned some of the R0.10s and said it is fine. Her attitude was the problem in the situation, from the initial cashier who dismissed us and called the store supervisor at Silverton Shoprite Liquor store, SilverMall. Why give us the coins as change if you discriminate against us when we try to buy with them as well? Please fix this!!!