VW Jetta - Exhaust Complications

Hello.
I own a 2012 VW Jetta (S/2.0/Sedan). Recently an exhaust leak had occurred within my vehicle, probably due to all the snow, etc. The leak has been difficult to find and very small. Pipe had a hole where the pipe meets the catalytic converter. My cousin welded me a new pipe and my husband slapped on some "quick steel" that we purchased from Advance Auto. The welded pipe was placed over top of the current pipe. The bracket had seized to my engine block which is why we did what we did instead of replacing the whole pipe. If I were to attempt removing the pipe, it could cause a whole other bigger issue and destroy my engine block.

After that was all said and done, I was still smelling carbon monoxide and there's still another hole somewhere else we discovered. Where at is our current question. I am afraid to take it somewhere for repair as I'll probably be told the whole pipe will need replacing.

Has anyone ran into this issue? Could anyone here offer a suggestion?
Thank you.