I need some advice

Hello everyone, I live in Romania and work as a cybersecurity researcher and developer.

I've identified a critical security vulnerability in a company, and this company has subscribers from all over Romania. With this security flaw, I can access customers' personal information without authentication.

I've attempted to report this security vulnerability to the company multiple times. I've sent several emails and tried to communicate via WhatsApp, but I haven't received any serious response.

Now I'm wondering what steps I should …

access advice authentication critical customers cybersecurity developer flaw hello information live personal personal information report researcher romania security security flaw security vulnerability subscribers the company vulnerability work