How to deal with harassing text messages and phone calls from real estate agents? Kneeling and begging to harass them in the same way.

I am equally uneasy. I was interested in buying a house a year ago and consulted several real estate agents. Later, I kept getting calls from Deyou Real Estate. I wasn't bored at first, but later I didn't have the patience to tell them that I wasn't going to buy a house. They kept calling. For more than a day, three or four phone calls and text messages came in, all of which were irrelevant real estate information. Later, I changed to a mobile phone with shielding function, but SMS still couldn't stop it. Yesterday, I received two more phone calls from Deyou Real Estate. I'm really furious. It's harassment. Call a different number every time. Deyou real estate is really rubbish. I hate this agency very much now. I hope the leaders of Deyou Real Estate can read my post and quickly correct this immoral sales behavior of your employees. Because you have had a serious impact on my life.