Update: Still hasn't arrived
I called the 0300 123 2241 number again and chose the option saying it has been outside normal processing times so I could talk to someone and they said everything is fine and they wont look anything up until its been 2 months
Letter was sent last week and I havent heard anything back in that direction either.
I really hope it doesn't take until the 2 month point for them to realize I never got my biometrics letter because that means my trip home and our plan to move in October are probably out the window