i received bad attitude from this branch

I have never in my life been humiliated like that as a client, i went to Mcdonalds Evaton to buy ice cream at drive thru, i was buying for 8 children so i wanted to buy with cash and swipe my card, they told me they cannot process a transaction like that they will have to cancel it and make to seperate orders to pay with cash and swiipe my card, so when the superviser arrived they she was very irritated and shaking her head,i paid cash for 6 ice creams and they only gave me 4 and they then asked me to come inside, when i went inside i had to go into the quee to wait for my ice creams and to swipe my card, when i arrived at the counter they said my card is declining, they busy saying bad things about me while i was looking for another card, i had to fight to get my other 2 ice creams that i had paid for because they didnt remember how many they gave me, so i swiped my card for the rest of the 2 ice creams i needed to pay and they gave me 2 ice creams i had already paid for, i was at Mcdonals for an hour because of the bad attitude by the time i arrived in my car with the other ice creams the other children had long finished their ice creams, i think it was the worst service ever