K i think i made an oop's cause i killed Erikur and the Thieves Guild Quest requires him to be alive for the quest, is there any way passed this? or am i screwed for completing the quest line for the Thieves Guild? i've already restarted the game once.

Sadly, from the Elder Scrolls Wiki:

Erikur is also an important part of the quest The Dainty Sload, for the Thieves Guild. Killing him prior to the quest will render it impossible to complete.

If you were playing it on the PC, you could use a console command to rez him, but that only exists on the PC.