Getting sponsorship? Answered

Hello everyone, I am currently by the end of my studies and I am also working as part-time.  Now I applied to be a volunteer for the Olympics and Paralympics for 2016 in RIO and have been selected for both which I am really excited for, but the only problem is that to be able to go over there It is very costly as I live on the other side of the world and I don't have enough funds and time is very limited to acquire those as well.  

So what I need is to find a way so that I can get sponsored for my air tickets and take care of my accommodation.  Here are the things that I have been thinking and trying to do as well.

First I looked for a job and I got it but the problem is that the pay isn't enough so that I can get the required amount to cover all my expenses.  I cannot get another job as I need to complete my studies before June so time isn't in my favour again.  However I think that I can work freelance online for short jobs such as 1 day to 1 month and If I can get as many as possible It should help.

 SInce those won't be enough I need to look for sponsors but I do not know where to look for and how to do it and I was also thinking of getting a job in the US or even south america so as to be able to stay and work there for a while after the event so that I can take care of myself and explore at the same time before returning to my home country.  

Any help. I really appreciate it.