I am about to lose my money to these thieves

My LTD company UNUM, has demanded me to send them my tax returns and W2’s for 2011-2013, saying I worked during that time! I tried to start a small home business but didn’t make a dime, and have the proof from that company that i made a whopping $38 commision which didn’t even cover the cost of the products. Here is the problem, since I don’t make enough money to file taxes, I haven’t since I stopped working in 2010. UNUM says if they don’t recieve them by 1-3-2017 they will stop my benefits. This all started after I wrote a negative review of how they troll people and try to get them so disgusted trying to jump through hoops to keep their own earned check, that they either walk away disgusted, (which is their goal)or can’t comply with their ridiculous demands on people that are already challenged by making them go to the Dr’s and making you do their work for them. I don’t mind recertifying once a year but they make you go multiple times and don’t document it so you look like a liar. I am about to lose my benefits to these thieves, any advice would be greatly appreciated.