Unauthorized WhatsApp Contact from Abroad

I'm very concerned about an unsolicited WhatsApp message I received from a foreign number with the area code +62815. The message was simply 'hello'. I'd like to express my strong dissatisfaction with this situation. If my account information has been compromised and my phone number is being used for unauthorized purposes, such as spreading messages or incurring debts in my name, I want it to be clear that I will not accept responsibility for such actions. I am convinced that WhatsApp is solely responsible for any consequences resulting from this breach of privacy. This incident has made me feel exposed and concerned about the security of my personal information. I hope that this situation is resolved quickly to ensure WhatsApp users' safety and privacy.