Safe Cart optimizerpro receved email saying charged my cc 14.95 since 2014,and will do so every 6 mo. never signed up for and can not contact them. Internet

Recevd e-mail from Safe Cart stating a renewal receipt for optimizer pro. That originaly started 06-15-14  for $14.95 and showed name and last 4 numbers of my credit card. Also that I am on a every 6 months bill cycle. I was unable to respond to email. There was a phone number listed, and have been unable to speak to a person. This is a service I never signed up for, or a renewal. I had to goggle them to even see who and what they are. Now I will be going through statements to see how many times they have charged me, since 2014.