How do I get a cable to pass through the hole in my wall without a fishing tool to get it all the way through to the other end?

I'm trying to set up an internet network for the second floor in my house without a fishing tool to get the cable all the way to the ground floor router. Is there a trick? or should I just buy the fishing tool?

Edit; I'm replacing a faulty cable with a new one.

Edit; It's a 15M pipe that runs through the walls all the down to the ground floor.

FIXED; The solution to the problem was getting a plastic sandwich bag and wrapping it like a bandminton shuttlecockand tying it around the cable, then using a vacuum cleaner on the other end of the tube hole to suck it right through and it works like a charm. Thanks for all the tips and suggestions!