No Rewards

On going to MiWays website I was told that I would get cash back after 3 months if I signed up online. I proceded to take out comprehensive insurance through the website for my car. The understanding was that I would receive one months premium back after paying 3 full premiums. So far I have made 4 payments and still have not received my Rewards. Even a 16 minute phone call could not resolve this. I need to know if I'm going to receive what was promised or start looking for an alternate insurance company.