eBay notifies buyers when a recall notice is issued for a product they have bought here.
Unless it's still within eBay's own 30 day money back guarantee they will have no further involvement except passing on the recall notice.
You should be able to find more information on the manufacturer's web site. Strictly speaking, any action required is usually the responsibility of the seller. If they don't want to know, which many eBay sellers don't, just bin it.