guys help me out

guys my chacha had an air pistol which i borrowed for some tie during diwali, i decided to give it back to him, he was having his lunch on the dining table and told me to keep it on the fridge, i did the same. after 4 days i didnt find the pistol there i thought he had picked it up but few days back he asked for it again and i told i gave it to you and he said i dont have it, i asked everyone in the family but nobody knows about it. my chacha thinks i have lost the thing but how do i tell him i have not don anything? and i am even ready to get him a new one with a cover on but my budget is only 2000 the pistol is the same as the attached picture.