even you stay out of the uae for more than 6 months, it is cancelled automatically that you can't enter uae..but, it is not cancelled and deleted from the immigration dept.

i advice you to contact anyone or any trusted friend in the uae. to do the necessary on you behalf. they have coordinate with your company (where you work before) to cancel your visa. and erase you from thier name.( they can release the bank guarantee and they can hires somebody in your place.)they will stamp cancelled and return the passport to you friend. be sure you have your exit stamp clearly copied and any thing to prove you are outside uae.