Claiming the profits of an investment with a company

I have invested in a company, which they promise to pay me 20% return in March 2015.

They paid my returns for about 2 years, though most of the times it was delayed. They stopped paying me almost a year ago and have not paid a single Dirham since then.

The company seems to be a fraud because the other investors with whom I am in contact with faced the same issue and their payments are stopped for one year.

I am seeking legal advice on how I can recover my money from them.