My question involves employment and labor law for the state of: az

I am on client side from last 3 years, my previous employer A had sub-contract with B, B has sub-contract with C and C is a vendor of my client D, who is having direct contract with my client.

A and D does not have any direct contract. But A has a signed contract with B.

I started working for client D after signing a contract with B and C.

I also had non-compete contract signed with my previous employer that I have to work with him at least for 1 year and after resigning the company I cannot join or work for their client/end-client atleast for 18 months.

It's been 8 Months I transfered my Visa to company X. but still working as contractor for same client (now it is me -> X -> B -> C -> D).

Last month I got a legal notice from my employer about breaching the contract (non-compete agreement) and asking me to pay 20K as settlement amount by end of May.

My employer has changed the salary structure multiple times as put me on % basis during their employment (Because in % my employer was eliminating the risk of paying on bench). whereas my offer letter says I am salaries employee. He never paid me promised variable compensations which were mentioned in offer letter. because he was paying me more than what was mentioned in LCA. He also did marketing of my CV while showing fake information.

I do not have enough money to fight a case.

Looking for advice from experts, if something can be done in this.