student extension on results awaited

My student visa is getting expired on 31st Oct 2009 so I would like to ask few questions related to my student extensions.

I have submitted my MBA dissertation and waiting for my reults and according to my uni my results will be announced somewhere in middle of the november 2009. My uni gave me a Visa Letter for Student Extension in which it is clearly written that my course EXPECTED END DATE is 30 November 2009, which is only a month after my Visa expired. I am applying by post as I couldnt get an appointment for in person.

I would like to that can I get the Student extension in this case?

Can I withdraw my application of Student Extension Once Ill get the results of my Dissertation and can apply for PSW?

Please Advise me as I am so Confused and got very short time.

Regards,
Zohaib