I have taken up medical aid with discovery health and being unemployed i have been on the lowest option Recently the premiums have doubled after submitting documents to show i have no income they still are charging me double For the 3 years I am on the

I have taken up medical aid with discovery health and being unemployed i have been on the lowest option Recently the premiums have doubled after submitting documents to show i have no income they still are charging me double For the 3 years I am on the medical aid I have not used it once And I have been living out of the country for these years. How is it that the premiums can double