Hi Andylou, welcome to the Forum, where you will find many people in the same situation, a great place to connect with and chat to other people.
Your story makes me feel sad, I have a Son who is an addict, and after reading your story, I wonder if the addiction ever goes away, what a thought, to have to live with.
My Son is currently in recovery, but always waiting for the time that they relapse, which is awful really.
Friday nights always used to be the worst when he was really bad and I know exactly how you are feeling about ignoring the calls etc, have been there many times.
They will only change or reach out for help when they want to. Cocaine is an evil drug, completely changes them in lots of ways. I think the lying is the worst thing, and it’s very hard to learn to trust them again.
Read other stories on here. Most important thing is to look after you and your children first.
Keep chatting on here, I find it helps a lot.
Take care.
Dx