Ignored after partially resolved complaint

I am very disappointed with the customer service team. I had a problem with a birthday gift voucher not being accepted on their website at the end of April, and Cindy Fisher agreed to resolve the situation. We cancelled my purchase, and she asked Tristan Kelly to reissue the voucher so I could remake the purchase with the discount. It now 3 weeks later, and the number has not been issued and Cindy Fisher has not responded to any further requests for an update. This was a very large purchase and the entire project has now been held up for nearly a month.