American Coradius International LLC Student Loan Complaint

American Coradius International LLC Student loan department,

Non-federal student loan Dealing with my lender or servicer Keep getting calls about my loan New Jersey

I have repeatedly told American Coradis that the loan is not valid and that they should stop calling my job or my home. I have repeatedly asked on the phone for proof of debt and that I signed any documents for the loan. They have not provided such proof. I sent a letter advising them to cease phone calls and provide me with proof. They have not complied, yet they keep calling. Apparently someone I used to know had a student loan that I cosigned for and was approved for numerous forbearances, and then defaulted. I was never notified that there were forbearances and default until years later. I did not approve this. I need them to stop harassing me and provide the proof that I have asked for on so many occasions.