The age of instant communication is great. Why? Because it allows those of us with intelligence to prove people like yourself wrong.
I had an acquaintance who, like yourself, actually believed that the earth was flat. (I know, how could a sane person believe this?) He would argue for hours about it. He told me that I had to prove to him that the earth was round. So, I arranged for him to video chat with several of my friends, who, like myself, are amateur radio operators. They are located across the US.
What we did was this. While on video chat, we simultaneously bounced a signal off the moon. Yes, in case you didn't know, that is possible. We then allowed him to calculate the distance between the earth and moon based on the elapsed time between transmission and reception of the return signal. We proved to him that the US is "curved". By then calculating that curvature, adjusting for slight differences in latitude, we proved to him the circumference of the earth based upon our relative latitude.
I also showed him that the "firmament" spoken of in the Bible isn't that firm. Even before the time of Christ, the ancients knew that the positions of the sun and moon as they rose and set, relative to the horizon, varied during the year. And that variance was caused by the earth "wobbling" around the sun.
It was sad that it took so much to convince my acquaintance of the truth. I would suggest that we ignore MaxR1996.