I would first reach out to Wyze: By phone: (206) 339-9646 Available Monday - Friday 5 am - 6 pm PT and Saturday 8 am - 4 pm PT
By your explanation, it sounds like you have physically removed power, waited for a bit and plugged it back in. If you did this and it did not work, plus you tried flashing the it back, then it might be a HW failure.
here is a link to another topic pertaining to the same issues: