ᐅ Liability after the insolvency of the general contractor

Hello everyone,
after reading what feels like thousands of posts but not finding an answer to my question anywhere, I hope this is the right place to ask...
Unfortunately, "my" house construction company had to file for bankruptcy! Unlike major chains, they were always transparent and advised me in time not to pay the final installment anymore.
Basically, we managed to complete my house (only a few minor things are still missing), but the electrician did faulty or insufficient work and now only wants to come back to fix it if I pay the remaining balance (~2500.00), which the company still owes him.

So, finally, my question:
My contract partner was the construction company xy. Their contract partner was the electrician abc.
WHO is now responsible for finishing the work and/or fixing the defects?
Thanks in advance