Desperately need advice, please read detail section!

I have been a household mover since the age of 16, and I am now 41. However I am on the tail end of an l and i injury and excepted the return to work job offer but after almost a month now and am only given an hour's worth of work and find myself sitting around for hours. When I attempt to go occupy myself and stay busy doing something that is within my APF abilities in the warehouse(sweep, fold pads, or put away material, I am told I can't be out in the warehouse and that I must come back into the office when there is nothing for hours for me to do. No employee has been kept on by the employer after returning from an injury the 5 yes I've been here. I believe there are trying to force me to quit cuz they can't fire me and eventually they will let me go but I'm concerned that the improper procedures possible for not sticking to the job offer that I signed. What does part that bothers me the most is that this job offer was offered at the last second right before I was going to go and be retrained for something new since I've done this all my life I don't have the skills to find another kind of job that's easier on my back so I was anticipating this retraining but the employer took it off the table and I think permanently now because he made that job offer and they're not sticking to the job offer in the end it looks like I'm going to get screwed and I'm very concerned cuz I'm a single father of two girls and if I don't have the skills for another job outside of the industry I've been in all my life so in the end it does not look good for me I feel I don't know if there's any legal thing I can do to try to get back the option to be retrained through the vocabulary services, can anybody help me