New Jersey Return

Hello, 

 

My employer messed up my withholding and said I was a resident of New Jersey for half the year. I filed my state returns and tried to get all of my $911 withholding back. I had to file a paper return for some reason and they only sent me a check back for $65. What next steps should I take? I tried reaching out to the New Jersey taxation department, but I have not had any luck yet.