Deal *****ed

I've never been so dissapointed with this company as a shop owner I lost a very good deal with a potential investor. I am a young ****a shop owner who Is on a verge of a break threw. Yesterday the 20 May i had a meeting with this guy who was going to invest inspected my property and my shop and as he was almost done he bought a 1.25 sprite then we spoke and went our separate ways on good terms however he brought back the Sprite has it had things inside that I cnt explain since it was sealed he asked how can he trust me with money whn I cant even check my stock and what I sell thanks coke