Thanks for the reply.

If Playrix is not able to restore my zoo, I will simply leave it empty and ignore that it was even there although I probably lose a lot of the fun of the game through this.
But if I would rebuild it again now, I would risk losing all I did again and again since apparently, this bug exists but there is no fix for it. I'm frustrated enough with the loss I had although I had just started but if I would lose my complete zoo after building it up for weeks, I might lose interest in the whole game and just stop playing it all together.

I find it sad that support seems to be so poor.