How to Remove Vocals Completely from a Song?

I tried many times to remove vocals completely from a song but I didn't succeed. Every time I remove them I find some vocals remaining. I tried many ways such as Invert, Equalization, Vocal remover and they worked but not properly. I found some vocals from minute 2:00 to minute 3:00. I can upload the song so that you check it if you want. I will upload the original version and the edited version so that you compare and understand what I mean. RSVP!