Before you proceed, you need InTouchApp installed on your phone.
How to import contacts to InTouchApp :
Step 1 - Visit : https://www.intouchapp.com/ and Login with the same details (as used on phone)
Step 2 - Click on the drop-down arrow located on the top right corner beside profile picture.
Step 3 - Select Import contacts option.
Step 4 - Click on Choose File button, then browse & select the file (csv, xls, xlsx, vcf).
Step 5 - Click on Upload button. Your contacts will be imported shortly.
(Note: If Import file is not processed, please open the supported file formats and follow the same pattern)