Discovery medical aid termination

Discovery cancelled my medical aid because they refuse to pay for a procedure which was to determine what’s wrong with me. I remember even the Drs couldn’t understand cause they say i didn’t disclose the condition, I email them and even sent dispute. Cause I can tell, even the Drs and specialist don’t know what’s wrong that’s why they wanted to do the procedure to find out, then discovery said no and send email of termination