Last night 18th November. I wanted to download this software for free, but it said there was a 99p monthly charge which I was prepared to pay. So I entered my credit card details and hit GO. A message popped up to tell me that if I was asked to pay for the software I had been scammed (a bit late by this point) When I got the membership number emailed back It said I was to be debited £58.76 and it would appear on my statement as Didsubscribe.com I never agreed at any point to pay this amount and on top of this I cannot access or use the software that was downloaded.

Have I given my card details to some unscrupulous outfit?
Can I get my money back?
Do I need to cancel my card?

This is really worrying me. I phoned my card company and they said to ring back on the 26th November and they would investigate, but what about mt card security now.

Please advise and help me if you are able