I am a frame builder AMA

Bought a frame 1-2 months ago, it's a bit fucked. Wondering whether it's cheaper to get it fixed or post it back for a refund... (I would ask seller to refund the cost of repair)

1. Seat tube is fucked at the top where someone used the wrong size post
   
2. A segment of a seat post is stuck lower down in the tube
   
3. One thread on the EBB is fucked.
   
   

Ballpark figure for a new seat tube and drill out/braze something into the EBB? @Hulsroy ?

Think I might have lost a good chunk of cash on this 😥