my employer doesn't what to approved my annual...

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We would like to inform you that according to the UAE Labor Law, leaves are one of the worker’s rights . As the law states the below in regards with leaves:
Article 75
A worker shall, for each year of service, be entitled to an annual leave of not less than:
1. Two days a month, where the worker’s period of service is more than six months but less than one year.
2. 30 days a year, where the worker’s period of service is more than one year.
Where a worker's service is terminated, he shall be entitled to annual leave in respect of fractions of the last year.
Article 76
The employer may fix the date of commencement of annual leave and, if necessary, divide such leave into not more than two periods. However, the leave division provision shall not apply to leaves of child workers.
Article 77
Holidays stipulated by Law or by agreement, and any other days of leave on account of sickness, falling within an annual leave shall be considered as an integral part thereof.
Article 78
Each worker shall be entitled to his basic wage and the housing allowance, if applicable, in respect of his days of annual leave. Where it was imperative for the work interest to put a worker on duty during all or part of his annual leave, and if the leave days on which he worked were not carried forward to the following year, the employer shall pay him his normal wage plus an allowance in lieu of leave, for the actually worked days, calculated on the basis of his basic wage.
In all cases, the worker may not be employed during his annual leave more than once during two consecutive years.
Article (79)
The worker is entitled for the salary of the annual leave which he did not receive if he has been terminated from the job, or he left the job after the notification period stipulated in the in the law. The indemnity shall be calculated on the bases of the wage of obtained during the leave.
Article (80)
Before a worker goes on annual leave, his employer shall pay him the full wage due to him plus the leave pay prescribed for him under this Law.
Article (81)
The worker may not waive his entitlement to the annual leave and any agreement to the contrary shall be void.
The worker shall be entitled to payment in lieu of his annual leave equivalent to his wage for the leave days to which he is entitled if the contract is terminated for any reason before the worker takes his leave.
Article 82
A worker who contracts an illness that is not a work-related injury shall report his illness within a maximum of two days; the employer shall thereupon take the necessary measures to have him medically examined immediately for the purpose of verifying his illness.
So if the employer was arbitrary in granting you leave without legal reason, then you can file a complaint in the labor office and explain the details, and you can leave the work without compensation but you have to prove the complaint or you have to pay compensation to the employer as below article states:
Article (116):
Where a contract is revoked by the worker for reasons other than those stipulated in Article (121), he shall be required to compensate the employer for any damage the latter sustains as a result, provided that the amount of compensation shall not exceed half a month wage for three months or for the remaining period of the contract, whichever is shorter, unless otherwise stipulated in the contract.
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