Amazon Seller Account not working.

I signed up on amazon seller and started completing my details and registration wasn't completed but after few days whenever is used to sign in to complete my registration process it always showing me following message.

"We are facing technical challenges currently. Apologies for inconvenience. Please refresh this page after sometime."

I tried Amazon Seller Support but it didn't work out they tried to help me on email and gave me a link saying that start completing your registration with this link, but that given link was also not working. I replied on the email but still got no answer. It's been 10 days and Iam still not able to sign in to my account. Need help asap.