Complete incompetent shitshow.
So yeah -- in case you were pondering using Gusto, just know that
* not paying out $250 in commuter benefits owed;
* not noticing the extra cash in their bank account;
* ignoring 3 polite emails to the support addresses, and one less polite request;
* ignoring the first phone call;
* requiring you to be rude;
* blowing their self-set update deadline;
is all part of the wonderful Gusto experience!
If you use them, I'd strongly suggest checking that all your commuter benefit reimbursements actually landed in your bank account.