I am 4yrs already with my employer running 5yrs...

According to the UAE, a worker who has completed one or more years of continuous service shall be entitled to severance pay at the end of his employment. The days of absence from work without pay shall not be included in calculating the period of service. The severance pay shall be calculated as follows:

1. 21 days' wage for each of the first five years of service.
2. 30 days’ wage for each additional year of service provided always that the aggregate amount of severance pay should not exceed two year's wage.

 you can calculate your gratuity accurately electronically through the website of the Ministry of Human Resources and Emiratization  
and the employer shall bear the cost of the worker’s repatriation to his point of hire or to any other point that was mutually agreed upon. Where a worker joins another employer upon expiry of his contract, the latter shall bear the cost of the worker's repatriation at the end of his service. Without prejudice to the foregoing, if the employer fails to return the worker or to pay his repatriation expenses, the competent authorities shall do so at the employer's expense and may then recover any expenditure incurred in this connection by attachment. Where the reason for the termination of the contract is attributable to the worker, his repatriation shall be at his own expense if he has the means to pay.