Claiming labor entitlements from employer without employment visa

I am an expatriate from India. I have received an appointment from my employer in April 2018 with an appointment letter as Sales Account Manager.

The employer told me he will bring me to Dubai with a visit visa and then apply for employment visa when I start working.

I joined the company on April 24th 2018 in Dubai and worked for 3 months and no employment visa applied by the employer for me.

I generated business from customers from the market as per my job responsibility.

As my visit visa expiry was due on July 22nd 2018, on July 20th 2018 I exit the country to India on their direction and came back again on a visit visa with the assurance of employment visa.

Now, the company is not paying me the salary as mentioned in the appointment letter. I am working for the company without being paid any money.

I feel that my position has been exploited by the organization for my blind faith in them.

Is there any way I can claim salary from the employer legally, as I am working for the company?