People are messaging these folks on Twitter to fix the glitched achievement. Might be worth a try as they can surely patch it.
@KimiMatsuzaki
@UbiGabe
@UbisoftSupport
Also check this thread for the workaround. It did not work for me but might for you.
http://forums.ubi.com/eve/forums/a/t...3671054656/p/7