Error, Orders Tracking not working

Hi,
We have issues with the Orders Tracking, was trying to add a new carrier and now we can’t even insert a tracking number…

https://public-api.wordpress.com/rest/v1.1/

The error says this:
′{ “error”: “access_disabled”, “message”: “API access has been disabled due to excessive usage. Please contact us at [email protected] if you believe you have received this message in error.” }

Please help ASAP, many thanks in advance.