Hi Muna,
all the above sounds helpful. I would also like to recommend you try building your CV on Bayt.com . We are posting over 12,000 Fresh vacancies daily, many of which are jobs in Qatar and would be of interest to you in the customer service field, am sure. Make sure your CV is complete because if it's not, it will not feature in employers' search results.
Best of luck with your job search in Qatar!