Resignation for the non-payment of salaries and claiming entitlements

I have been working in a free zone company in Dubai for 14 months and I did not get my salary for more than 8 months.

Every time I was asking for the salary, the employer tells me that he did not get payment from clients and he is still saying like that.

Now, I sent the resignation letter due to the non-payment of salary, but the employer told me that I cannot resign and I need to finish my 3-year contract otherwise he will deduct the amount from my salary.

I don't want to work for this company and also I have a good offer from another company.

So, do I need to work for the employers? Will I get a ban?