The service I used was Dave's WalletRecoveryServices and he managed to unlock the wallet in just a few hours.
Glad you found help this quickly and got your coins back.
So to sum it up: I really did enter a passphrase and I just didn't remember or write it down because I thought I could recall it from memory--it was really a facepalm moment when I received the password from Dave. It wasn't a typo of any sort. It was not a Trezor firmware update issue/hardware issue. It really was just a grave human error, with a lot of carelessness and complacency. Never again. I hope.
Please don't forget your passphrase, or it can lead to an early, painful demise.
I partly blame Trezors UX for the issue. Giving first users such an easy access to something they might not be fully educated about yet and without the correct terminology being used. Makes it too easy to shoot oneself in the foot and getting confused. In my opinion and from watching beginners use hardware wallets for the first time, a passphrase should only be easily accessible to people who know that theyre looking for it and it should be clearly labeled as such. Will send them some feedback.