I am waiting to be reinstated. When sending a message to the generic "Contact us" I saw a pop-up telling me to use this email address...
mturk-account-appeals at amazon.com
It took less than a day to receive a reply...
Important Message from Amazon Mechanical Turk
Greetings from Amazon Mechanical Turk,
Thank you for your patience while we reviewed your account. After review, we have reinstated your account effective immediately.
However, it looks like you created an Amazon Mechanical Turk account with us some time ago, but did not complete the registration process.
Please follow the link below to complete the registration process:
/beginsignin
We appreciate your continued participation in the Amazon Mechanical Turk marketplace. If you have additional questions, please email us at mturk-account-appeals @ amazon.com.
Sincerely,
Account Specialist
Amazon Mechanical Turk