I’ve just realised I completely misread your post. When you said “the lady who was supposed to take you”, for some reason I interpreted this as being the nurse you were supposed to have the appointment with. I didn’t realise it was purely a transport problem, and thought the nurse herself must have cancelled. Hence the advice to go to the doctor instead.
If it’s NOT a problem with availability of the nurses, then I agree it makes sense to try to get the transport sorted out, rather than forego the appointment.
But MS nurses still aren’t the be all and end all. If you ever, for any reason, can’t get to see one, don’t rule out your doctor as an alternative route. They CAN prescribe symptom relief (mine needed a little bit of education on that subject, but she’s fine now), and they can refer to neuro, physiotherapy etc. as required.