Reliance Standard offset SSDI benefits I never received, and now won't give them to me due to initial refusal.

I have LTD with First Reliance of Hawthorne New York. They are refusing to give me the offset SSDI monies. I have been on Workers Comp for since 2013 and applied for SSDI in 2014, but was denied: currently waiting for a hearing. Okay, the issue is this, when I received my first check from First Reliance, I noticed offsets for Workers Compensation, SSDI (which I don’t receive), so I called the examiner and questioned the deductions. She said that was the process and she could request that I receive payments for the SSDI, but I would have to reimburse them if SSDI is approved. At that time, I told her to hold off on the SSDI, because I didn’t want to pay them back. However, a few months later after receiving a denial letter from SSDI, I called the examiner and requestied SSDI payments. I later received a later from First Reliance stating that they needed proof that I was denied and also proof of the hearing request, which I later sent to them. Now they are telling me that they cannot give me the offset amount because I refused initially. I want to find out if that is legal, and if I will receive retroactive SSDI offsets if I am denied at the pending hearing. Oh yeah, they are always asking for updates regarding the pending hearing.