Poor customer service from Exclusive Books!

I received a digital gift voucher. When I wanted to use it online after placing an order, it was rejected. On 26 Nov I send an email to Exclusive Books bringing this to their attention and asking for a solution. I received a reply after 8 days! This forced me to visit a store twice in order to sort out the problem before I could eventually redeem it. Simply not good enough and poor customer service.