I have a defective item which I want to return outside the sellers return period. Ebay cannot help

I have a defective item (monobloc tap)  which I want to return outside the sellers return period. its advertised as a 180 trial with a life time guarantee, The seller is not contactable and appears to have blocked me.  Ebay cannot help so how do I escalate  this as its clearly a sellers con. And the ebay site does appear to have anyway of reporting or discussing this issue which is why I am raising this on the forum. 

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eBay only allow buyers a thirty day period after the latest estimated date of delivery during which to open a case in the eBay Resolution Centre, so if you have run out of time to open an eBay case then your only other option is to open a case against the seller via PayPal.  PayPal allow buyers a maximum period of one hundred and eighty days from the date of purchase during which to open a case against the seller, so if you have not yet run out of time to do so log into your PayPal account, locate the transaction in question and open a PayPal case against the seller, citing Item Not As Described as the reason for opening the case.  PayPal tend to check cases far more closely than eBay do, so if you are still within time to open a case make sure that you escalate the case to PayPal two days after opening the case, and before the twenty day cut-off point.  If you do that then you should receive a total refund of the money that you paid to the seller; however, if you allow the case to time out, or if more than one hundred and eighty days have already passed since you purchased the item, then you will not be able to get your money back.