Sweet Bonanza Sending Unwanted Gambling Texts

For about a month, I have been receiving disturbing messages related to gambling and so-called promissory notes from the number 0850 *** ** ** to my Turkcell line ending in 0530 151 6***. Even though I block the messages, they continue to arrive with different content, usually in the evenings. I have no idea how my personal information was obtained, and I am extremely uncomfortable with this situation. So far, I have not contacted customer service or any other authority.

I am concerned about the security of my personal information and request that the necessary actions be taken to completely stop these types of messages.