You might try adding more information so people can get a better idea of what's going on.
Is he eating? Drinking?
How are his droppings?
How do his eyes look?
Is his breathing raspy?
Is he walking or just standing still?
How long has this been going on?
Any other birds acting off?
What did you deworm with and how much did you use? Was it in his water or did you hand dose him?
Edit: forgot to add.. if you notice on the top of this forum part of the tips to getting help is to have a descriptive title not "Please help me" but perhaps "My peacock has been acting listless for 3 days and not eating" or something like that.
Not picking on you, trying to help you get help.