Pathetic customer service

Cre@tivity Trade Route Mall staff need to learn what is customer service.

An item was purchased at the store, whilst still at the cashier my mum advised that she will not use it and requested a refund. We were told very abruptly that they cannot refund as it is sale item and Very rudely the cashier also states that no other shops will exchange sales items. After sometime we were forced to take something for the same amount. Can the staff please be trained on customer service and learn to have respect for customers as they behaved as if they are doing me a favour. The "supervisor" of the store is none the better, she gave us such dirty looks and did not even utter a word.