How to claim labor rights after resignation for deducting salaries without consent?

I want to ask you.

I am working in a private hospital for the last 13 years and my salary is 7712. In 2021, I worked March & April (salary not received for both months).

After that, in May, my company told us about salary deduction from March to May. They told us it's only retention and they will return it to us. They made a contract and took signatures.

After that, they told us in MOHRE that the retention word was not there, so they changed the contract and made a deduction from March to May 40 % of the salary and took signatures.

But the company told us it's retention and they will return this money to us. After this, from June to August, they deducted our salary without any notice and signatures.

For September's salary, which we didn't receive yet, it's also with a 40% deduction and it will be the same until I resign.

Can you advise if the company can deduct my salary for 4 months without any signatures and continue until I resign?

In this situation, please advise for the above and tell me how much I will receive.

Kindly acknowledge the email.

Thanks.

G.