PSV Health Sciences Institute Unauthorized charges of $37.00 in January and December, 2017. Internet

I finally had the chance to review my credit card statement and I saw a charge of $37.00 from the above Institute. The name sounded familiar but I don't know or remember purchasing anything from them. When I looked at my email I saw emails after emails from this company which provides educational info re health and wellness.I continued reviewing my whole year's statements and saw another charge from the same company on 1/22/2017 for the same amount. I called the credit card company to question this charge but they seemed to have doubted that I did not buy anything from them.If I did, I don't know what it was for.