There are a lot of things in animal husbandry that on the face of it look to be cruel and inhumane but usually are not. Do you spay or neuter your cats or dogs? Think how inhumane and cruel that is. I don’t have any experience with de-beaking so I can’t speak to that directly but I try to not be too quick to judge.
I don’t know where George Western Cape is but if it is in the United States you might call your county extension agent and talk to them. They should know someone that can give you detailed information about the practice, probably someone at the state land-grant university or a local vet. If you are somewhere else you might have a ministry of agriculture or something like that office nearby you could call or visit.
It would help solve your problem if you could figure out why they are pecking each other. As Judy said, normally it is overcrowding but could also be nutrition. Chickens are also attracted to wounds. They will cannibalize another chicken that has a raw wound, especially if it is bloody. Also, is it just one chicken doing it or all of them? Some chickens are just brutes and not fit to live in a flock.
A little information on how many chickens you have, how much room they have, and how you are feeding them could help.
Good luck!
Judy, check your math. One square meter is about 10 square feet. One meter is just over three feet. Three square meters is about 30 square feet.