@diane694 and @bonbon2006, it sounds like you have taken the right steps to request an appointment at Mayo Clinic. Mayo Clinic has more requests for appointments than available openings,. Some steps you may consider:

Ask your doctor to submit a physician referral on your behalf.
Request an appointment at another Mayo Clinic location.

Another option is to consider seeing a doctor within the Mayo Clinic Care Network https://www.mayoclinic.org/about-mayo-clinic/care-network.
"The Mayo Clinic Care Network is a select group of independent health systems that are granted special access to Mayo Clinic's extensive knowledge and world-leading medical expertise. Carefully vetted and selected for their commitment to high-quality patient experience, care network members share Mayo Clinic's goal of providing patients the care they need, close to home, at no additional cost to the patient."

Find a health system in the Mayo Clinic Care Network near you: https://www.mayoclinic.org/about-mayo-clinic/care-network/network-members