Taking too much money off a single parent with a part time job

I’m absolutely disgusted with the c.s.a. I’m a father and pay my way,5 months back people got laid of at my work place and i got asked to do a bit overtime here and there, yes I’m going to accept it because only doing 20hrs a week the money isn’t great and a few more hours would help.

The so called c.s.a got to know, this month with looking at my income ect,and are taking 250.00 this month of me,138.00 next month and a further 100.00 the month after,this is disgusting.

How is a single parent like myself suppose to live on the rest of the money for a whole month and take my children away on holiday.

The c.s.a are suppose to be helping me and figure out what i can pay,not take the lot of me!!!

Thanks