I want to like Telegram, I really do. But even with the "privacy" settings as strict as possible, I get unsolicited messages from random strangers at all hours

I want to like Telegram, I really do. But even with the "privacy" settings as strict as possible, I get unsolicited messages from random strangers at all hours of the day with no ability to mute them. I get 2-3 of these messages per day on both of my Telegram accounts. I don't know how anyone can consider Telegram private or trustworthy.