Here’s what consumers have asked with answers from Tobi staff and previous consumers.
Contact customer service and tell them, this happened to me before using a few other websites and they told me to place the order anyway and gave me a refund for the items that were overcharged. Pretty annoying when you have a 50% off code to use and they mess it up!
With your best interest in mind, I would advise that you return in separate packages with labels from each order and watch it closely from beginning to end of the return so it doesn't slip through the cracks. Get a tracking number for each also.
I live in the Bay Area outside of their SF headquarters so I've rec'd my items with in 3-4 days typically.