Hi, thanks for your question. You should hire a lawyer for specific legal advice. No attorney client relationship is created here.
There is no 'form' to use. You would have to file an adversary objection during the case.
You would file the summons in the adversary proceeding.
You need to file certificate of service.
You would file the adversary complaint
You would set out your 'undue hardship elements
The court will set a hearing.
Then the court will set a discovery schedule
the creditor would answer
Then the court will schedule you a trial
Once done, you would motion the court for final judgment on the matter.
The blank forms will be found on the bankruptcy court website in your district
Let me kniw what other questions you have