Can you just disregard those harassing calls and messages while on your days off? I would just set my phone to ignore their number.
With regards to crappy pay, I agree, FO pay is a joke, especially combined with this €130000 scheme, but if time to command is not too long for those joining Wizz with some experience, it should be doable.
I'll take 5000 Euros in Eastern Europe doing day trips over 8-9000 in the sand pit, flying 95hrs a month through 15 time zones.