Faulse advertising for Avbob policies

I took an investment policy in March 2017 the guy who was selling a policy to me showed me in 10 years the money will be very big I can't something close to 100k . I received the policy document didn't read it. When I went back to it last month. I realized it was way too little than what they promised me. I went to their offices to cancel it on Wednesday 28 August they promised me 7 days up to now I haven't received any. I need my money back I surrendered my investment policy.