Canceled Policy

I had a policy with Old Mutual that I took out via a financial advisor at Nedbank. Due to financial reasons we contacted the advisor and informed him that we would like to cancel the policy (this was in the beginning of March) he advised us to just cancel the debit order with the bank as well which I did on the 10th of March. At the end of March another R500 went of my account and again in the beginning of April. The April debit order bounced back because there was no money in my account. Now today another one went off again and this after I canceled everything. I spoke to Nedbank about this and they informed me that their hands are tied because the policy is not with them. I want my R1000 back that was taken from my account because this policy is canceled