If your termination was without any notice period or valid reason, it could be against the Saudi labor law.

According to Article 74 of the Saudi Labor Law:

"The work contract shall be deemed to have been terminated upon the death of the worker or in case of his incapability to perform the work as decided by a medical commission."

Furthermore, Article 75 states:

"The worker may not be dismissed, his service may not be terminated and he may not be warned of either unless he has been notified in writing thereof."

Additionally, you should be aware of your end of service benefits as stated in Article 84: "The worker shall be entitled to an end-of-service award of a half-month wage for each of the first five years and one month wage for each of the following years. The entire period of work shall be calculated, including fractions of the year."

You can file your complaint online through the Ministry of Human Resources and Social Development's online portal. Here are the steps:

1. Visit the Ministry's official website.
2. You need to create an account if you do not have one.
3. Click on "individual services", then on "labor complaints".
4. Follow the on-screen instructions to file a complaint.
5. Note your complaint number for follow-up purposes.

Remember to provide all necessary supporting documentation, which could include email communication, employment contract, any proofs of your claim, etc. The complaint review process can take between 1 to 3 months. The Ministry will deliver its decision via email, SMS, or through your account on their portal. In any case of dispute, the matter could be escalated to the Labor Court.