That hamster you bought got sick and died within a week, but I think it's no use for you to go to the shop and complain. It's quite possible the shop clerks will say you had played with it till it died.
你買嘅嗰隻倉鼠喺一星期內病死咗，但我諗你去店鋪投訴都冇用，好可能啲店員會話係你玩死咗佢喎。