Getting Clients

Hello, I am a life coach that specializes in addiction recovery. I have been working to get clients since January. I have one client now who was a referral from another coach. I am going to networking events and connecting with people after the event, I have called and emailed over 500 people telling them about what I can do and how I can help. BUT, I am not getting clients. It is not a mindset issue. I feel like my books are full and everyone wants to work with me, it just isn’t happening yet. Can you help me figure this out? Thank you so much!