or if you are going to change to a Cassette anyway why not change to a cassette and continue to use Zwift unit your month runs out, giving Zwift time to send you a new Click.
I see from your picture that you appear to have your own workshop - probably very handy at your own repairs? Have you read the following helpful forum posts?
I don’t know enough about your set up to really help but I think these three posts cover the main fault issues surrounding the Click and virtual shifting.
Keep trying with Zwift until you find the most helpful support.