This is one of the better quests in Flyyf, it is not bugged its just that roji is greedy and will take the hole stack of items you bring instead of just the amount needed for the quest so only bring what is needed.

Polluted Mas Dungeon 1
Kill Mutant Feferns to get 1 Dungeon Tarin Root, Kill Mutant Nyangyangs to get 1 Dungeon Starstone, Kill Mutant Bangs for 1 Dungeon Golden Wing

Polluted Mas Dungeon 2
after you go back to roji you need to 10 more of the same 3 items.

Polluted Mas Dungeon 3
From Mas Dungeon, go north then follow the path until you can turn left. Then keep going straight until you can turn left again. You will reach a dead end with chests. Worm Venduques spawn from the chests.