Sellers are allowed to send a Feedback Revision request.
The buyer's refund is not contingent upon the buyer agreeing to revise the FB.
Did you contact the seller before leaving the negative FB?
Sellers asked to be notified of any dissatisfaction before negative or neutral is left.
From seller's listing for the ring:
If you do not like this ring upon arrival or any other reason please know of our 15 days full refund policy. Please feel free to email me or call me to resolve any issue in a positive manner before leaving any negative or neutral feedback.

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