Last minute change to my application possible?

Hello,
I am a Modern Languages undergrad and I'm about to go on my (compulsory) year abroad in France. Originally I was going to do an internship the whole year, and thus I applied for, and got the non-means tested maintenance loan of just over £3k for the whole year. However, the first half of my internship suddenly fell through and so now I'm only starting it in January. The first half of the year, October - December I will most likely do a 2-3 month language course instead in France. Can I still change my application so that I can receive the means-tested, higher maintenance for the first term? It is a bit tight as the first payment is due on September 2.
Thank you I would appreciate any help with this.