I'm surprised it didn't fall out, after what you have done. I don't know if it will help, but there is another bolt you need to loosen, at least, I gained access with a ratchet on front, move the fan around, and open end on back, both 17mm as I recall, and loosened the threaded "L" bolt, you say is not attached, I think. Anyway, mine were replaced after an in correct replacement belt was purchased, albeit too long. At worst you'll have to remove the crank pulley I'm afraid. Or cut the darn things off, and get a closer belt size. This info is for U.S. cars. P.S. your sig is not showing.

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