Unauthorised auto renewal

i have had 99.99 charged to my credit card for an auto renewal I haven’t authorised. I don’t have all the details required to cancel online how do I get this cancelled and refunded as I don’t have the computer anymore that it is installed on

Hello Dianne,
You have contacted our Sales team and the refund request has been already forwarded to concern team. They will initiate it and get back to you via email.
Your patience is much appreciated.