Universal Tire and Auto, LLC

First off I purchases four tires 2one brand an 2 another from universal tires on Sept.10 2016 and then got a flat on i4 which I take back to universal tire in Longwood FL. they say valve stem issue I guess so I go to get it fixed they can't find me in system because employee enter wrong info no reciept but they have computer,so to fix my 398$ four brand new tires which one went flat I'm told I have to buy another new tire for 88$ and gentlemen on phone said o I doubt that he sold u 4 tires when 2 don't match well guess what he "DID" and all I get is sorry all I can do is sell u a new one