a) Login to your account. Click "Membership". There you can buy credits instantly online with your credit card
b) You can submit your credit card information online using our secure form
c) Call us 1-866-Y-SINGLE (1-866-974-6453). Outside US, call +1 (312) 252-0005 or +44 (0) 2071935504. If you get a voicemail with "Thank you for calling 1st International", you can safely leave the credit card number and expiration date on the voicemail. Do not forget to leave your profile ID or nickname and a call back number.