Buyer claims Canister lid missing

I recently sold a full Canister & Spice Set including Rack.. I am very methodical when it comes to packing my items, these canisters are nestling canisters.

 

I know for sure, as I had repacked item the day before I posted that every piece was there.

 

I received an email from buyer - buyer's first purchase on ebay, saying that one of the lids was missing.. I responded that I packed it. He again emailed me saying that if he didn't receive the lid he would return item to me. I again responded I had posted it.

 

This was Friday & I have not received any further communications from the buyer.

 

I am sticking to my guns here as I know every canister & every lid was packed..

 

I won't be intimated nor threatened by a buyer.

 

Any suggestions.. Ive spoken to ebay twice about this matter...

 

this is not my seeling ID