Can CSA take 50% of my wages without informing me?

February 5, 2021

I recently checked my latest wage slip, and much to my surprise, the CSA has taken the best part of 50% of my wages.
I admit, I have arrears, and do need to pay them, however, they have not sent any letters to inform me they would taking money from my wages, also I am on furlough at he moment, so getting less, and I am trying to get money together for somewhere to live.

I guess I just want to know if it’s right that they can do that, without letting me know it would be happening?