Read the contract terms & conditions again. All illegal activities during your employment period are considered as fit for disciplinary action on an employee. Specially obsconding is termed as abondoning the services with out any notice to the employer, thus making way for them to frame charges as they want. So, who don't have common sense now ? As long as you are alive with in Qatar the sponsor is responsible for him/her, so takes safeest measures against you, thats it. He should be ashamed to think of coming back to Qatar having a black mark, even on a visit visa.