So these birds are 26 days old? They have a brooder location with a heat source... Right?
If they're 26 days old that means they are newborns and the person who told you they were friendly was trying to make a sale. They have no sense of being friendly - they have almost no sense of anything! They are tiny little 2oz balls of fluff and you are a monster the size of a mountain, crashing into their home.
You have to earn their trust slowly and carefully. Start by just sitting down outside the coop, hum or play radio or music softly so they get used to human sounds. You can read a book or whatever, just get them used to not panicking from voices. Then move from there. If you can, sit in the coop with them, very quietly, and just read a book or something for a few hours every day for a week. Then you can start to try to imitate a mother hen with your hands, down low at their level. Make cooing sounds and offer food or treats, tapping at it with your fingers like a hen might with her beak. Work with them slowly. No sudden movements or loud sounds. Eventually they will be climbing all over you. This may take time, though. Never come down on them from above.
Note that if you have any boys in the flock this is the WORST way to raise them. The chickens will eventually come to see you as gentle, harmless, food-bearing, even one of the flock. When the hormones hit, the roosters will see you as a threatening, bigger rooster that's too weak to defend their hens from younger boys. Generally the hens never grow into this, they will just happily peck at your toes and fingers and fly up into your lap for treats... But the boys can get aggressive this way.
Also, remember that chickens are not dogs or cats. They do not usually like "cuddles" or "petting" or being touched. Chilling with/on you is often the extent of their love.
Go slow, stay low, and you will see results.