Sure, I'd be happy to assist. To verify the correctness of your end-of-service benefits, we need to refer to Saudi Arabia's Labor Law, specifically Articles 80, 84, and 87.

Here's how it works according to those Articles:

1. **Article 80:** If the worker has spent two years or more in the service of the employer, he/she has the right to an end-of-service award. The award is calculated as a half month's wage for each of the first five years and one month's wage for each of the following years.

2. **Article 84:** For calculation purposes, the wage corresponds to the last wage the worker was earning, and includes all allowances. The end-of-service award should be proportionate to the time of service and it is calculated on the basis of the last wage and the worker is entitled to an award for the fractions of the year proportional for the time spent on the job.

3. **Article 87:** If the worker resigns, these benefits are adjusted based on the length of service. For 2-5 years of service, the worker receives one third of the award. For 5-10 years, it increases to two thirds. It is full for those who resign after 10 years.

If you have all relevant details (length of service, final monthly wage, reason for ending service), you can calculate it this way. Also, kindly make sure you review your contract to see if there any other specific arrangements between you and your employer.

Note, this advice is general in nature, and if you believe there are significant errors, it might be useful to seek advice from Minister of Human Resources and Social Development or Labor court in Saudi Arabia.