Oh man sorry to hear about what happened..I've seen mechanics take out the good bits in cars and replace them with bad,worn,or broken parts.Which,like some of the other guys,I try to do my car myself unless its too much.
But thats nasty what that workshop did to you.Its good you are not displaying their name on here.(In NZ you'd be legally accountable for tarnishing any business names..duno about there lol)But would be nice to know the workshop so others can be know where to go you know.
But hope everything goes alright aye..that they rebuild your engine for free and everything is settled.I know the horror involved in having a dead rb26..its not good!