Bad customer interaction

I ordered paint. Had to wait for more than a week for availability after calling everyday. No order number given upon order... After day 4 the staff member asked if I wouldn't go and collect it in a different town! When it eventually arrived (day 10) I went to the store and wanted to exchange the different colour had I bought after giving up waiting for the right product. The cashiers don't have any clue how to handle customers - unfriendly, zero eye contact... Apparently the system doesn't allow exchanging and she had to do a refund for which they did not have cash! Hello, this is 2022. Who does transactions and refunds with cash when I initially paid with a card. I had to stand there patiently waiting like an idiot for about 20 minutes while the numb cashier and her superviser (?) tried to figure out what to do. Soooo unprofessional and very frustrating. They really wasted my time.