Reign of the Undead - Revolution

When I throw molotavs I one of these things happens-

1. I get no points at all just a hit marker.
2. I get 250 points per kill, (I am premium I should be getting 450)
3. I throw it into a group of them, and it only gets like 2 zombies out of 25.

Please fix this, its making the game very difficult.

1. Then you didnt kill the zombies, in hard waves it's possible that zombies have too much health
2. Then you had a wrong CD key probably. You always get 450 points with premium
3. Same as 1. probably