Unhappy customer

I have had a Greenlight policy with old mutual for about 6 years now. I missed 1 payment and my policy was terminated. I Then went to the Southgate office to find out how to revive it. They told me to fill out a form and then it would be revived. This was in October, I went again November and still nothing. I went again in January and was told that a form that had to be filled out by my DR was sent to Thomas Skosana on the 24th of November to send to but this was not done. He only sent me the form on 11/01/2019. Now my DR wants to find out how the report will be paid for and Thomas is not responding to emails and when I call him he just says he is busy. The Dr also called the call center and they were told that no request for a medical report was made. Please can someone assist ASAP.