Old mutual greenlight policy

I'm so disappointed with their service I had a greenlight policy with them for over 4 years now. When I change my job on June I went to them to change debit plan instead they rushed to open new policy, July when I went to check why they didn't debit I was told I missed one premium therefore my policy has elapsed. I filled the forms to reinstate it I never got any update until last week when I contacted them and be told I didn't fill the form correctly. My 4 years of paying R470 in one policy down the drain now and they are not willing to help