Though less serious, my wife has a similar problem with Amazon. She tried to review a product (first review for a very long time) and was greeted with this message:

"! We apologize but Amazon has noticed some unusual reviewing activity on this account. As a result, all reviews submitted by this account have been removed and this account will no longer be able to contribute reviews and other content on Amazon. If you would like to learn more, please see our community guidelines. To contact us about this decision, please email reviews - help@amazon.co.uk."

The 'community guidelines' link goes to a page with what the rules are, but doesn't say what rules have been broken.

We emailed Amazon, using the email address in the post and got this reply:

"I relayed your information to the team trained to handle this scenario regarding your inability to post reviews. They are not able to provide an exact date or time when they expect this issue to be resolved. For more information about our policies, please see our Community Guidelines (http://www.amazon.co.uk/review-guidelines) We appreciate your patience in this matter.

Warmest regards,"

'Warmest Regards'? Really - you just told me she's locked out and it's gonna stay like that for the foreseeable future. :(