Business ProfileforDavid's Bridal LLC

Two years ago I was going to get married and purchased $476.00 worth of items from David's Bridal at **** ********* **, Whitehall, PA *****. When I went to return my items a few days later, I was told that after 7 days I could only get store credit. They opened me a credit card which I received and still have available. And they put my balance of 476.00 on a David Bridals gift card which clearly states on the back that it does not expire and is as good as cash. Fast forward to last week, I stopped in to make a purchase. When I got to the check out, I was told by an employee that they no longer accept their own gift cards or credit cards. I requested to speak to a manager who said there is nothing she can do. I am basically robbed of $476.00 and was never notified via email, mail, or text that these changes were occurring or why. When I expressed my emotion and concern to the manager she simply shrugged and said sorry, have a good day. I left embarrassed and upset and had to leave all of my items that I wanted to purchase. I am requesting a full refund from David's Bridal. I have attempted to contact their customer service numbers online and on the back of both cards, and am being told by all of them that there is nothing that can be done. This is unacceptable and unjust. Please help.