I thought my subscription had automatically renewed, but now I can't activate my license.

Activation failed: The number of activations exceeds the default limit. Please deactivate the license on another computer and try again. For more information, see the DS Support Knowledge Base. (3/0)

I get the above message and cannot activate my license.

I also contacted support but haven't received a response.

My work has stopped and I'm in trouble. Please help me.