can some one tell me how to tighten the Chane pls nothing i do seams to make any difference

Not familiar and without pics will have to guess, so a guess it is...Slacken off the wheel nut and using an allen key, turn the adjusters clockwise just a little, move each one by the same amount. A little adjustment makes a big difference so dont overdo it. Check for correct chain slack and re tighten wheel nut, replace splitpin as necessary