Need advice against a dodgy solicitor (Firm).

I am separated from wife since many years, my children live with wife, I have indirect contact since many years.
I applied for direct contact but it application was refused because I was abroad and couldn't attend trial hearing.
So my direct contact was refused in beginning of this year. But my indirect contact was not affected, it was still active.

All solicitors and judge know about it.

But my wife's solicitor wrote letter to my children school that father has been refused contact (DIRECT AND INDIRECT) from court now, so don't share any info with him.

(1) My indirect contact is in force yet.
(2) Even 'for example' I don't have any contact but still I am married & natural father of children, I have Parental Rights automatically.

My wife's solicitor is her relative who have already started campaign against me in favour of my wife. He misguides her and gives her dirty tricks and advices to spoil my life and throwing me out from children's lives completely.

He has couple of cases of my wife & family about immigration and family; he is helping them even knowingly that their motives are illegal.

He also use some of his colleague in his firm too. He is not firm partner but just a normal solicitor; Also he is Asian who is backing up for Asian relatives (my wife) in even wrong cases.

I need advice and help from you that:

(1) I believe the letter to school from the solicitor was against court order and he manipulated the truth to stop me getting my children reports etc from school. His intention was to winding up school against me and keeping me away from children's life completely.

Is this crime?
What do you advice?
What action I can take to ban this solicitor, as he is breaching SRA rules and misusing his power as a solicitor.

What law says, about these kinds of solicitors and what should I do?
I want him to stay away from my children and wife's life as he is misguiding them and spoiling my and children life by misusing law tricks.

What do you advice about it?

Thanks