CSA taking money from a pension

We received this email from John about the CSA taking money from his pension:

Is there a way of stopping money going out of my privite pension, can I put a court act to stop it which is not a lot as that the only thing i get £500pm with that 400+pm i live on and they what £170 pm i will be living?

How will i live ill will be homeless?

Can anybody out there can help?

This sounds bad John, but what are the factors here; as in how many children have you got, what are their ages, are you in arrears and where are they living and who with?

Without any of this info we can’t advise you properly.