How did you pay him, hopefully paypal or something similar? If you still can't get him to honor the refund call up his local police department and file charges for mail fraud. Also contact the postmaster, and do the same thing.

When you send them back to him, make sure that you have it as signature required for delivery and a tracking number.

Good luck.

 

Since when do 2g DSMS (non Turbo) run a bluetop injector? They have the dodgibish 420a, and the injectors are high impedence.