Bad service

Hi I bought a wedding ring in July at NWJ WOODMEAD that I was supposed to use in December but with whatever the circumstances the wedding is off,then I went back to NWJ asking them what can they do for me?they said they can't do anything for me,now for the first time I hear that their return policy is within 10 days,then what must I supposed to do with this ring,I don't need a refund just give a voucher I will buy something from that store and I will never buy anything again,I don't wanna lie they have a good service at that store but the company has a ****ed up policy which is not visible to customers, who writes a return policy at the back of the invoice?