I missclicked instead +TRADE i clicked Exchange items so dispenser sended me 19 gift (Defy Gravity Extended) back to my account. I thought declining gift everything will be fine, but no. Now, that gift is stuck at my dispenser. What to do ?

http://steamcommunity.com/profiles/76561198181210907/inventory/#753

You will have to wait for the auto-item recovery system to find your items (it has already found them).