First time ebay seller

[waynburk-8]

Managed to sell my product and only had 1 sze medium  and now ebay has sold to someone else but I don't have any to send customer  it was listed as sold and not on my own account listing only a size small tried to contact buyer and no reply what do I do 

[tobiasd4]

Your listing showed as 2 items available in medium.

You also have live listing for small.

If you didn't have 2 medium, you should have only put 1.

You will have cancel 2nd buyers item as out of stock.

[waynburk-8]

Thanks for that I typed in the wrong number sorted now i think its not on
my page anymore I hope cheers