I've managed to log in and this is what they say
Support Helpdesk Emergency Maintenance
Dear Customers,
Our upstream datacentre is experiencing temporary issues. The Support Area, credit card processor are affected. As a result we might not be able to process emails/tickets or chats at
https://support.namecheap.com for some time and payments using credit card possible at this moment. Payments using PayPal and account funds should go through. Also, funds can be added using the credit card.
Our Customer Support Team is online on Skype providing support from there. For exact Skype accounts contact details please refer to
http://status.namecheap.com
We sincerely apologize for the inconvenience and thank you for your patience.
You can refer at
http://status.namecheap.com to see updates