I don't recognize this charge from MASTERY TEST PREP

When charges are processed by our company (Higher Learning Technologies), we use the merchant name "MASTERY TEST PREP" as a charge descriptor, as a majority of our products have the word "Mastery" in the title. The shortened descriptor may read only "TEST PREP". 

Most likely, your recent unrecognized charge is for a subscription to one of our products. All of our subscriptions will automatically renew until canceled by the user. We do our best to make this clear at each point of purchase and understand that sometimes subscriptions can be forgotten. We will always refund a recent charge made through our website if contacted within 7 days of the charge if the renewal is unneeded. Our Customer Success Team can gladly assist you with this. 

If you have already submitted an email to our Customer Success Team, we will reach out to you within 48 hours to help you resolve the issue! Our team is available Monday through Friday from  8AM to 4PM Central Time. Emails received over the weekend will be answered first thing Monday morning in the order in which it was received.

If you have not yet sent us an email, please feel free to contact us at [e-mail].