Edgars Account number is ***

I went to an Edgars store at Westgate to pay my account and there was a lady in the shop who approached me and asked me if i have an insurance with Edgars and she would check for me if I had a beneficiary on my Personal Funeral Plan. She then told me I didn't have anybody added as a beneficiary, and she wanted to help me add one for me. The next thing I see more charges on my account with a new insurance that I didn't opt for. I wrote an Email to Edgars customer Services explaining to them what had happened and asked them to please cancel and reverse the charges. I am told that I could have cancelled within thirty days. How would I have known that I had a new Insurance added on my account if I didn't ask for it, I only realised when a new statement was sent to me with additional charges.

Could you please help me with this.