Calum,
This is simple now.
The bank will not give you his details and even if they did what could you do with them.
But, they will give them to the Police, I don't care what anyone thinks, he's robbed you plain and simple, don't let this go cold, get yourself to the police station and insist they investigate it, I don't know how old you are and it might help taking a sensible adult with you.
Don't let him rip you, accept no excuses, let the police sort it out, if he promises your gear then let the police deliver it lol!
It is fraud, he has stolen your hard earned money,