No help from whirlpool

bought a whirlpool top loader from metro lifestyle boksburg in May 2022.. Cant find the original invoice, but did find the dispatch note from the company with all the info of that invoice on it. The shop closed down so I cant get the original from that store and whirlpool still doesn't want to help me. I mean everything they need is on the note but just because it says dispatch note and not invoice they don't want to help!