How do I get a local tax preparing office to accept responsibility for failing to file my 2014 taxes?

I received a letter from the IRS stating that my 2014 taxes had not been filed, and I'd be hit with almost $1500 in fines and penalties. I found my paperwork showing that I had filed with a local tax preparer. I took the letter and my files back to this same preparer, who, immediately prepared the paperwork for 2014. I mailed it off by the deadline, but the company is unwilling to handle the fines and penalties. They said the could help me set up a payment plan.