PG&E has quadrupled my bill since this spring when my utility use has?
Happened to me recently.I called them. We did a reconciliation.They messed up.They got their calculations right, and its all good now. If you are not able/not wanting to call them and asking what to do, sounds as if youre into litigation, but its doubtful that your investment into a lawsuit (time and money and time value of money) would pay off beyond them saying, Oops! and giving you a small account credit.