How to change column format?

Hello,

I want to change in a column the text from 1,2,3,4,5...,11,12,13,...111,112,113 to 001,002,003,...,011,...111,112,113.

I tried format(text,"000") but it does not work.

My problem is that I join 3 columns to a key e.g. VS00001-1-1 and I want that it looks like VS00001-01-001 and so on.

Someone an idea.

Thank you for your help and time!