Well, that's odd. There were changes to the collet, but you should have received the correct wrench(es) for the collets you got.
Since that's not the case, just give the service department a call and they'll fix you up. Their number's below in my signature.
Alternatively, send me an email with your name, shipping address and phone number and I'll get one sent out to you.
Thanks,
Shane Holland
Festool USA