I bought a set of headlights over 90 days ago from a company on eBay. They seemed fine and I took my car for an MOT and about a month ago. The mechanic told me that the adjuster motor on one of the headlights doesn’t work and the headlight needs to be replaced. This is something I wouldn’t have known without taking it for an MOT. 
I contacted the seller as the listing stated they had 1 year warranty and they agreed to send me a replacement if I sent them a video of the issuer. I did this and now they are ignoring me. I’ve sent them a number of messages asking them to respond to me but they continue to ignore me. They were expensive and I have no way of rectifying this without buying another set of headlights. Is there anyway that I can raise this issue with eBay and get a refund as the seller is not honouring the warranty? The only thing I can seem to find is the Ai online chat which is less than helpful.