I've left my last uni for a year and I am recently considering to apply some master courses. However, I didn't get any reference letter from my last uni, I've tried to contact those who I think might write me one, but it seems they have all left. I don't know what to do now since all master courses require at least two references.

Also, with a Sociology and Criminology degree and one year experience in a top-tier investment bank back office, do I stand any chance to be accepted by top (Warwick, nottingham, LSE) universities for MS economics and Finance?

Any help would be appreciated. many thanks.