someone scam me and I don't know how to do this

[old lodge]

So I make a jasa design and then I trusted him because he owner of Mains and have bfg. So I think he will not scam me but this is happened.
The block that I buy is
265+ manor block
Manor steps stone 16-18
Red and white manor wallpaper 120+ (red 60 +white 60)
Manor door 3
Glue 500-600
Candle 50+
Jungle pillar 30+
Black couch 20
Scroll bulletin 2
Crystal wallpaper 80+

I design and he just give me 5dl and run away with my design and he say, he already break it and just pay me 2dl for that my design (7dl)
I say to him the block is expensive and he don't want to refund me. I say to him then give back my block but he say like wasted time for buy my block. He say me a such scamer nub kid ;-;

I need help someone T-T
A rich person scam me

I put the price when I buy the block but him say I make a fake price ;-;

I already say to him to check in ihemo

But he say such a nub kid liar