Capital One Credit Card Complaint

Capital One Credit card department,

Transaction issue Florida

My - yrs. old daughter without my permission used my Capital One credit card to purchase - concert tickets valued at $340.00, later that day looking at my notifications on my phone I see the charges and called Capital one, they told me I needed to call the police and present charges to my daughter ( needless to say I developed a knot in my stomach ) the agent proceeded to contact the merchant and they did not helped even though I mention that I was within my 3 days to rescind, plus I did not authorize this transaction, I did therefore disputed the transaction today I received a letter from Capital one saying they are charging my account $340.00 because the merchant showed my daughter made the purchase, mind you this concert is for -/-/15, which is in the futurePlease help me