Hi Gina!
y
Thanks for posting this. And the comments your co-worker make are very inappropriate, and probably illegal. Since you have gone to your manager several times about this, what other options do you have? Is your company large enough to have a Human Resources person? If so, I would go to them. If not, who is above your manager? I would go to that leader and share your concerns. If that does not work, then there are governmental agencies which look out for those who have physical limitations, and even a small company has to abide by federal mandates.
I know of a company who was fined hundreds of thousands of dollars for someone in that company making fun of someone who was totally deaf. Now that company makes every effort to accommodate the deaf person's needs.
Please do not put up with that kind of treatment.
I wish you the best in your future!
Don