I work for this company and it's a good company, it's just that right now there's an admin clerk 'Brian' who is starting to miss paying me for the full amounts of money I work for

I work for this company and it's a good company, it's just that right now there's an admin clerk 'Brian' who is starting to miss paying me for the full amounts of money I work for. I tried calling him he is not picking up my calls and I'm in a site I can't go to his office I work 06:00-18:00,that is all outside office hours. Please if anyone could help me with this, please help me✓™😭😭🙏 because he is dropping my calls and blue ticking my WhatsApp that means he doesn't wan to pay me my money 😭 💰