Unauthorised Charge to Credit Card

I have just receivd my Credit Card Bill and discovered an authorised charge for DRI TREND MICRO virus software I did not order. I realised that this was installed on a 4 year old laptop that I now no longer owned but was given away sometime late last year. That was the only laptop that had the TREND MICRO antivirus software. I presently own a new laptop which is already has McAfee antivirus pre-installed. I am sure the Anti Virus update is now expired on the old laptop I have given away but I no longer own it or am willing to pay for it. Please reverse or refund the chasrges as soon as possible!