Game Kenilworth putrid customer service!

Wow I have never received worse service in my life ... after choosing a watch ... I was told to pay at the cashier ... I paid and returned to collect the watch only to be told that the battery is flat and that I need to stand in the customer service line for a refund on the battery... I paid for a working item now I needed to stand at customer service for 40mins!!!!! I can’t understand! I requested to speak to the manager who said she is sorry but there is nothing that she can do! The whole atmosphere from the employees is so laid back and unconcerning like they couldn’t care less! Will never ever shop there again!