Convert Excel Contacts to VCF

I have a spreadsheet with 1,977 rows laid out as First Name, Last Name, Phone Number, plus a Company column and category that is populated for every contact. I need the entire list turned into a single, clean .vcf file that WhatsApp can import in one step on an Android device.

Please map each field precisely:
• Given Name + Family Name → the vCard name fields
• Phone Number → mobile/tel field
• Company → org field

Use a vCard 3.0 (or newer) specification so the file is universally accepted. After conversion, verify that the total number of cards equals 1,977 and that a test import to WhatsApp shows names and companies exactly as they appear in the sheet.

Deliverable:
• One .vcf containing all 1,977 contacts, ready for immediate WhatsApp import, with no data loss or formatting issues.

Let me know your turnaround time and, if needed, any clarifications about the spreadsheet structure.