What would you do?

When somebody 4 times ur size, huge fists and body sells you 2 sugar cubes of LSD for $10 and they turned out to be fake or "hardly any acid in them" as in the only effect I got off on them was faster heart rate and body temperature. My depression became more depressed also. I didn't trip at all not even close, but I read somewhere that Zoloft decreases the effects of LSD and I take Zoloft. Any ideas?

P.S. I don't have the option to shoot the guy.

Write it off as a mistake, and buy from someone you know.