If you intend on suing yourself,  Small Claims court has monetary jurisdiction on matters up to $5000.  They also have a  program to mediate the issue.  If your contract was with the contractor and they breached it - they are responsible for the subs although I would probably name every conrtactor that set foot in the bathroom on the suit - then you should be compensated. Understand that Small Claims only alows monetary relief - money.  You can not force the contractor to fix the problems there.  Your suit is one for failure to provide proper services.  I would get an estimate from some one reliable on what it would cost to repair and take lots and lots of pictures and bring in all your paperwork - contracts, bills, etc - and correspondence as evidence.  Good luck.