URGENT: Cybersecurity Crisis - Phone & Facebook Marketplace Hacked

I've been a victim of a serious hacking incident that's severely affecting my business operations. My phone system, recently switched to RingCentral, is being tampered with. Calls from customers are being blocked and forwarded to other businesses.

- Phone System: All incoming calls are being manipulated, leading to a complete halt in communication with my customers.
- Facebook Marketplace: Whenever I post cars for sale, the hacker intercepts potential buyers, preventing them from reaching out to me.

I've contacted my phone service provider and they are currently investigating, but I need immediate help from a professional. If you have expertise in cybersecurity, particularly in recovery from hacking incidents, please reach out. Your timely assistance could save my business.