I know from being on the receiving end of a rude cashier how you feel. However, if it's their store policy to place restrictions on certain returns with "gifr receipts" or "no reciept" I don't think it's unreasonable, They did try in some way to please you when you called and spoke to a manager...a little flexiblity on your part and a little flexibility on their part could have resolved this issue.

You did recieve full value for the returned ring so you are left whole. They offered a little something for your trouble and you refused. I can't defend you on this one.They at least tried. Now they know how you feel and I doubt they'll try after being refused once.

Maybe a better solution would be to give them the benefit of the doubt after some time passes.

And I'm sure posting your personal iformation was an oversight...happens to us all from time to time.