Anyone local to me capable of correcting errors on a 904 race build

It had reverse with brake engaged , no forward gears I took it to local well-respected shop with a trans dyno, they can make it work I'm sure

Why because , from the day I send him the money to build it , it took months and months to receive it (believe it was 8 months) and after all this time, its a leaking , not working pos ..

I'm over him and his workmanship and non customer service