When you reset your password, you then need to enter Recovery Key in TS Client. This Recovery Key was given to you on the first startup and you were meant to save it in secure place.
If you don’t have that Recovery Key, you’re basically screwed, cause you won’t be able to decrypt your account details. The only way would be to use Fallback, but this wipes everything.
And no, TS Staff can’t give you your Recovery Key or any new one. You are the only one who was able to see it and it was you that had to save it.