Poor service for defective product

Getting now help whatsoever, bought a brand new Samsung 55" UHD TV 1July2022, found hard to notice dead pixel , store of no help to swop out. online chat started discussion , no then halfway thru just stopped talking during session, same with email , sent receipt and photo proof of issue at hand. I just want to swop out unit is it that difficult? , at this point of time I feel just to return it and get a refund. poor service all around...