Capital One Credit Card Complaint

Capital One Credit card department,

Identity theft / Fraud / Embezzlement California

My credit card got unauthorized use about $1800.00 on -/-/16 and I found it by myself at the end of -. It looked a typical fraud case through non existing website and described as I spend purchasing a service, not products. Normally, this kind of suspicious spending is found by credit card company by monitoring my usage but they did not. I called the credit card company to dispute the amount and once they credited the amount. But after a month later, they reapplied the amount to me after their investigation. I do n't understand the result. Because initial purchasing was done in Florida and credit card transaction was done though a processing company in - -. They gave me a report to show purchasing IP address but it was not mine and even not in - - where I live/work in. A couple of days later from I received the report from the credit card company, I received a letter from -, a computer company. I have purchased a tablet through their official online shop. They said that they had been hacked ( attacked ) by a third party and lost customers information including credit card numbers, addresses names etc. I used that credit card to purchase and the date of purchase was impact exactly - got attacked. I have written a letter to explain the situation to the credit card company attached - letter and asked again to dispute the amount they reapplied. It has been more than a month but the credit card company does not reply me and they keep quiet but putting the amount on my account with APR. I have paid the amount I spent but I have not paid the amount unauthorized use because it is not my responsibility. I am 100 % innocent, I have never used that big amount though internet. Now I have no idea what I should do and who I can ask to help or resolve this problem. I really need your help.