Credit card debited without authorisation

Hi <br> <br> I have bought products that costs R205 at Experian/ credit expert on 25 February 2015, and paid using a credit card as the system does not allow any other method of payments.<br> <br> The product expired this year on 25 February 2016. To my surprise, my credit card was debited again this year in February without me authorising that payment. <br> <br> I called Experian on 02 March 2016. Cancelled the product even though I never renewed it. I was told the system renew the purchase automatically without my permission. I was then told that I will be paid back an amount of R203.00. To my surprise today on 16 March 2016, I checked my credit card account and found that no money was returned to my account. I called Experian again, this time I am told that I will receive a refund of R194.00 . I don't understand how this company operate. why are they not refunding my money while keep on charging me for the product I did not purchase in the first place.