I worked in HR for nearly 3 decades and one of my responsibilities was handling ADA requests. Your HR person is clearly incompetent and is violating ADA law. It’s her responsibility to respond to your request in a timely manner. Do not let this linger any longer because you feel sorry for this “suffering” HR person. I would file a complaint through the EEOC - that will get your company to take action real fast. Do not suffer this fool who clearly cannot handle her job.