I have an unexplained charge of $399.91 on my credit card for "VERIZON*DIGITAL CHAT E800-922-0204FL". I see in a prior thread that others have found these charges for "tax" and other incidentals, but in much smaller amounts. I recently received a new iPhone 16, but cannot imagine what this amount could be for, nor could the phone rep, including after reportedly speaking with the financial department. Anyone?