The first thing you should do is to get some benefits advice. That income is far too low for an adult and 3 kids. There may be variables in there that we do not know about of course, but on face value that is your first port of call.
You need to feed your family and pay your essentials first, the debts are of a lesser priority. I don't doubt that they will need sorting at some point, but one thing at a time.
Regards.
Cert DR
23+ years in debt advice
I do not post for anyone other than myself