Maybe it's because Wizz has a temporary hiring stop for foreigners. (what i have heard from a base captain).
On the other hand, Wizz is very good in changing plans withing several hours (on the recruitment part).
Fact is that Wizz is still expanding and crew must be hired to get the planes going. (Cluj, Kiev and other route expansions)
Means of contact by Wizz towards candidates can be email or phone. It differs from time to time. As this still is a low cost airline, things are un- organised at management levels.
I also know several pilots who are told they are hired but still not there. Another groups has been hired within 3 months after passing the interviews.