Is there any way to get customer support? I posted this question several weeks ago. No response. Can't find any phone number or anyway to reach anyone on customer or technical support. Even answering "no" would be better than just ignoring users' questions
When you say you deleted them from your network, did you delete their user or just Remove them from your network as shown below:
If you just removed them from your network you can re-invite them, but if you deleted the user or their tasks, there is unfortunately no way to recover it. Once they've been deleted from the system they are unrecoverable.