Package handler - Package Handler FedEx Employee Review

I was hired on PT and told they hire FT within the company. However unfortunately after I was hired I was diagnosed with a spinal disease and could no longer lift hardly at all. They accommodated me, and I work hard still and am a good employee, my issue is when I talked to not management but accommodations person and someone else I was basically told they would have to look into seeing if someone being accommodated fancy of my disability that can’t lift could even be considered for a FT position. I’m not sure if this is legalized I didn’t know I had the disease until after being hired on. But I’m a hard worker regardless, and that’s why there are other spots they need help in that don’t involve lifting (for people like me . I’m not sure who I can talk to about this. The accommodations person basically told me the area they gave me in is for people that need “light duty work” and thatcthevjob may just not be for me. I take that job seriously and was very interested in FT. That sounds like discrimination to me.,other than that I really enjoy working there. Accommodations basically said they are basically doing me a favor by finding other areas to work in to keep my job. And that those areas are made for people who “really need it”. I know this can’t be right... I love it there and want to quit my FT job to work at FedEx and go to school. Does anybody know anything about this? I’m a good employee and this doesn’t make sense.