MyIQ Test Charged Unauthorized Subscription Charges To My Credit Card

Today I used the “My IQ” app, which I accessed through an online advertisement, to take an IQ test on my smartphone. I agreed to pay around $1.00 CAD for the test and entered my credit card information for this small payment. After completing the test, I noticed that an additional $41.72 CAD was charged to my credit card without my clear consent or authorization. I was not properly informed that such a high extra amount would be taken, and I did not knowingly approve any subscription or similar recurring payment. I request a full refund of the unauthorized $41.72 CAD, the cancellation of any subscription or membership that may have been started through this transaction, and written confirmation that no further charges will be made to my card in the future. I kindly ask that this issue be reviewed and resolved as soon as possible.