My ssa1099 has workers compensation offset that shows my income as $19,000 more than it was which is making me owe big because it put me above poverty for obamacare.

the offset was for 2015 and 2016 and added up to 32000.  I have called IRS office and they told me to call SS and ask for a corrected copy but I have called SS office 3 times and they tell me it is the way it is and I have to claim it.  Because of this amount, I don't qualify for the Obamacare that I have had all year so I am owing 7000 back.  Yet, I didn't receive this amount in 2017.  I only received 12,000.