HiI need helpIHAVE BEEN LEFT HORRIBLE FEEDBACK WHAT DO I DO

I sold some coinsand the person is saying the were bad I was shown some photos and knew

straight away they were not my coin the positioning of the coins and stapling

The stapes were not flattened which gave it away

It was a 2004 hollograpic coloured coin

The seepage was old

The 2 I sold had no seepage none then one had old seepage I mean old I would not sellit

and have sent proof sets back because of it

Not only that they are now saying they did not receive coins and every coin was scratched pitted

I am not like that and I have sold thousands of coins but never ever received this

This buyer has trashed other sellers because of there stance to them

What do I do

I will say this there is no way I am going to take the coins back

They cannot be all that badI know that for fact and make sure that the coins to this seller we

near perfect because perfect is only a word

Help