My son is four years old and has no contact or support from his father since before his first birthday is there any way I could change his surname to mine without his father permission

My son is four years old an has no contact or support from his father since before his first birthday is there any way I can change his surname without his fathers permission

No not really. You would have to petition the judge to allow the change and you would still have to ask the father. Do you have a support order? If so then you can go back to court to have it enforced. If you don't then why not? You can't force a person to visit but you can have financial help (or he can face the penalties).

If he will not, you can hire an attorney and try and get permission though the courts,

But in general is there a support order in place, have you turned it over to child support enforcement