To my knowledge, the Valets can't.
Anyone can complain, even lie and tell false stories in an attempt to cover up, or achieve a goal, but in "Lyft Land", the squeaky wheel has the best chance of getting the grease.
The Valets, and drivers enjoy a lot of "unsupervised freedom", the BA, always on the move, have seen that freedom abused in Divvy, Chicago.
As far as I know, that has all gone unreported. Except for one Valet that was so bad, they built up a reputation and was eventually, thankfully, replaced (as well as altering the very useful Valets system:(
It took a lot if text messages , e-mails, mostly X messages, and we're still not sure what worked, but from my experiences with Divvy, many, most, of the Valets and Drivers have no idea what we're doing or the BA thing and complaining more, is better than less
