TransUnion Credit Reporting Complaint

TransUnion Credit reporting department,

Credit monitoring or identity protection Billing dispute Minnesota

Got an email from Transunion telling to look at a credit report, they want my credit card for verification, a few days later s=charged my banl $17.00 without any notice or authorization. I closed it immediately but still am being charged. Why is this not illegal? I saw no checked box authorizing this and I check all the time. This is an awful company preying on people with credit problems and poor people. Charged - no less.