ما العمل في حالة رفض صاحب العمل إلغاء التأشيرة عند إنهاء الخدمة؟

Greetings.

Pursuant to your query, please be informed that your employer must cancel your employment visa prior to you exiting the country.

In case you're within the UAE, you can approach the Ministry of Labour and file a complaint against your employer if they refuse to cancel your visa.