Hi Karlo,

as per Qatar Labor Law, Article 39
as stated;
The service contract may contain a provision subjecting the worker to a probation period to be
agreed on between the two parties provided that the probation period shall not exceed six
months.
The worker shall not be subjected to more than one probation period with the same employer.
The employer may terminate the contract within the probation period if :

"it has been proved to him that the worker is not capable of carrying out the work provided"

that the employer shall notify the worker thereof before at least three days from the date of termination.

as per your case, if the employer thinks your not capable of the work and or negligent, as per law he has the right to terminated you given the probationary period. if he does not have any grounds to do so, then you can go to the ministry of labor and complain.