Sterns — refund refusal

Address:

2302

I put a ring on layby at sterns and the lady told me all i needed was the layby card that
Has all my payment information. And now because of personal reasons i do not need
The ring anymore. I went to the store to ask for a refund but they tell me i must provide
Proof that i was paying even though i have the first slip and the card with payment info
They wanted to give me a voucher that forces me to buy from their store even though
I do not need or want anything from their shop. I do not understand how i can be
Forced to buy from a jewellery store, i have never been in a jewellery store and the only
Reason that put me there was for the wedding that is no longer happening.
I did not receive a product form sterns, but they refuse to give my money back.