If a place of employment is not following Medical Restrictions do I have the right to seek legal action?

If the problems you have with your feet rise to the level of a disability under the Americans with Disabilities Act (substantially limits your ability to walk or stand and the condition will last for approximately 6 months or more), then the employer is obligated to provide a reasonable accommodation that would allow you to perform your essential job functions.  An example in your case might be providing you with a stool to do your job or give you the opportunity to sit every hour, as an example.  If the employer deliberately assigned you to a new department that is completely contrary to your medical restrictions once they received notice of your disability, this may have been a deliberate act of discrimination and a violation of the ADA.  You should meet with an attorney to review your options and determine if there was a violation of the ADA.