Nostalrius Begins - Quality wow vanilla realm (1.12)

Hi, today i made a party to complete the whole chain, it took about 2 hours (something like that) to complete the whole thing. Sadlly, at the last step, when you have to turn the Sigil of Ignaeus at the tomb, i completed the quest and had to pick the final step of it, "Trol'kalar" (talk with the quest giver and receive reward+exp). I was level 37 at the time and the game didnt let me grab the quest, so everybody finished it, except me.
Pretty mad, i decided to take it later, ventured alone inside the zone (full of elites/died several times) until i reached the tomb again, just to discover that, since i already turned the quest, and the game failed to give me the final step, i cant interact with the tomb anymore, so the quest is dead to me... right there.

Below i share with you the list of the whole chain, in hope that anyone can fix this for future occassions and maybe give me the quest with a command or something like that. This is the step i cant take anymore: http://wowwiki.wikia.com/Quest:Trol%27kalar_%282%29

The quest rewards are: 6000 XP, 350 reputation with Darkspear Trolls, and items that can be sold for nearly 1G.... so, i think its a big deal.

[37] Trollbane
[37] Sigil of Strom
[40] The Broken Sigil
[40] Sigil of Thoradin
[41] Sigil of Arathor
[42] Sigil of Trollbane
[42] Trol'kalar
[42] Trol'kalar

Thanks for your time, sorry if my english isnt the best.
Have a nice day!

You need to be level 39 for the final step.

Even if i reach lvl 39 i wont be able to complete it, i cant interact with the tomb since i lack the previous quest conditions (for example, having the sigil of ignaeus while on quest)

Still the same, up!