User Activity

i really gave up with this .. site " ebay.ca " .... i am not able to set item quantity to list my item ... i have 20 pcs ... but when listing my item there is no option to enter the quantity i have .... not like " ebay .com " ..... how to do it ???? ...
a buyer opened a case against me , he returned the item then i made full refund BUT not through ebay , now the case still open !!! the buyer do not know how to close it so HOW WE CAN CLOSE IT ???? i scare ebay double charge me the same amount !!!!!
i want to try to sell on ebay ...i sell elsewhere not on EBAY .... today i received a message from PAYPAL telling me i am no longer need to wait for 21 days to receive payments means any payment i receive will be available immediately .... SO is that...