I'm in a world of hurt

[Iansidious]

I didn't know that there was a time limit on destroying the Sithrak portal.I went there as fast as I could but some Sithrak tied me up for a little bit.I saved the game just before I went into the Perditio system and before I reached the portal a message tells me that I failed to destroyed the portal.I load the game so I could try again but the same thing happens each time.I saved the game at the wrong time .Any advice or cheatcode?