@pkh3381, if you are already a current Mayo Clinic patient, then it is best to get a referral to another Mayo Clinic department or physician through your existing Mayo physician. You can make this request through the patient portal.

However, in your case, you do not wish to make this request through your current Mayo neurologist. In that situation, it is recommended that you contact the Office of Patient Experience.

Mayo Clinic Office of Patient Experience
Phone: 844-544-0036 (toll free)
Email: opx@mayo.edu
https://www.mayoclinic.org/about-mayo-clinic/patient-experience
It sounds like you may have already contacted them. I encourage you to contact them again if the case is not resolved.