No, you should have said "No thank you, have a great day" and keep on walking. You already bought the item and you have no duty to them for anything further.
(I do this at any store that checks receipts, except for Costco, because I don't want to risk them revoking my membership. Never had a problem.)
I don't know why you're getting downvoted, but I also don't know why anyone would stand in a line to leave a store. Just say no thanks and walk past them, like every other unwanted solicitation.
(I do this at any store that checks receipts, except for Costco, because I don't want to risk them revoking my membership. Never had a problem.)