Unauthorized debit on my account

Halo I have policy with Hollard of funeral cover they added a cover that I didn't authorize I went to the branch to query that they said there were gonna assist me but they didn't help me I called to query that I even wrote an to the complaints department but they didn't respond I want them to refund my money because I didn't agree to add a cover on my policy they have been taking the amount for 6 months now