First why u left country without withdrawing the money this is biggest dought for everybody ,so if u have any issue to be settled with bank or any company where u work or loan of any claim just forgot that or they may contact qatar immigration or law agencies for u once they confirm ur presence here or if u r 100 % clear u can go to UAE on visit any time any ban or 6 month ban due to work visa cancellation doesnt stop any person to visit UAE