Pertinent information is all missing -hard to make anything conclusive from OP's post
I have similar doubt as mia does. There is no pertinent, important information provided by the OP -
Specifically, The value of the purchase and the reason WHY the merchandise needs to be returned - defective? not the same as purchased? OP simply has buyer's remorse?
So has the OP disputed the charge and being turned down by Chase because MC cited with the merchant?!