importing business contacts

[kristi@epichealthadvisors]

I have tried everything I know to import a csv of my business contacts. I have made sure the column headers are the same, etc but it keeps giving me an error message and says wrong csv, required columns are not found: mobile. I don't understand. I have tried to make a dummy contact like support on 3cx says and then export it so I have all the right column labels, but there is no export button, only an import. I have tried to make a support ticket, but when I click on the login in the far right and see my account and options such as add system, my systems, support, etc, no matter what I click and even though I am signed in, it takes me back to the portal login page and tells me a subscription is required and asks me to either create one or delete mine. This is so frustrating! Please help!