If the Credit Card details have to be stored in your website,
1. The site must be SSL enabled.
2. The CC details must be encrypted and stored in the database.
3. When the customer enters the Credit Card details in the site, all the numbers of the card except the last four digits will be sent to your email and the last four digits will be visible in the admin.
All the digits should be combined and then the payments should be processed. This adds to the Security.
Having 9+years of experience in eCommerce solution and consulting, we are sure, we can get this done with quality.
Hope to hear a positive response from you.
Thanks and regards,
Priya