You can make payments online, by phone, or by mail.  

• To make payments online, log into your PayPal account, then select your eBay Extras Mastercard, Smart Connect or PayPal Cashback Mastercard from your account dashboard. From here, you can make a one-time payment or set up autopay.
• To make payments by phone, call the toll-free number on the back of your card or the phone number listed below.
• To make payments by mail, use the payment address provided on your billing statement.  

eBay Extras Mastercard: 866-419-4095, 24 hours/day, 7 days/week

PayPal Cashback Mastercard - (855) 938-3684, 24 hours/day, 7 days/week

PayPal Smart Connect - 866-571-3012, Mon - Sat from 4am - 10pm PT, Sun from 7am - 7pm PT