Do not have life insurance but account debited

I do not have any life insurance policies with Discovery Life but my account was debited with R21. I contacted them but they keep transferring me to another department. Here are the details as it appears on my statement:. Transaction Details<br> Description One<br> DISC MEMB *** <br> Description Two<br> Transaction Amount<br> -21.13 <br> Service Fee<br> 0.00 <br> Authorisation Date<br> 18 Nov 2015 <br> Effective Date<br> 18 Nov 2015 <br> Code<br> 5510 <br> Description<br> Magtape Credit <br> Category<br> Receipt<br> Sub-Category<br> Electronic Receipt<br> Post Date<br> 18 Nov 2015 <br> <br> PLEASE REFRAIN FROM DEBITING MY ACCOUNT WITHOUT MY PERMISSION!!! <div><br></div><div><em>(Supplier name changed from Discovery Life to Discovery Health by Hellopeter.com)</em></div>