I'm sorry to hear about your troubles, but I'm glad if you are feeling better and able to work now.
The type of suspension you describe is meant to be temporary. But it CAN take some effort to get lifted.
Emails sent to customer support are not always answered immediately. You may need to be patient while things are worked through.
Also, make sure you look everywhere for any communications from Upwork, and respond to everything they ask you to do.
Be sure to look for communications from Upwork in:
- ? -> Help and Support
-? -> Disputes
- email in spam filters
- Under the Question Mark icon
- Under the Bell icon
- in links you can click on displayed at the top of your Upwork screen