Headlight Experts Led vehicle headlights Irvine California

I purchsaed a set of led headlights for my truck on 11/10/22, they they recomended I buy the cambus anti flicker and I purchased at a higher price and just installed 11/24/22 and driver side light went out within minutes then the passengr side went out while driving home. I Contacted their customer service and I was told my vehicle wasn't maintain correctly due to lack of maintanance it didnt work which I know how well I maitain my truck no recals or outstanding tbs service. they won't refund me my money due to the fact that installed them how can anybody check something purchased especially lights with Installing them. don't order from them they will take your money.