Hello klo
Simply because you do not know how to call Switzerland from the U.S., it does not mean the phone number is wrong 🙂 The 0848 44 66 88 phone number published is primarily for customers from Switzerland and Europe.
Try: + 41 51 225 78 56.
If you cannot call this number, then contact your cell phone provider, as they restrict international calls.
Perhaps we can also help you with your questions, and you do not have to call at all.
Kind regards,
Roland