again they understood the Gospel even among
the loudness and phone calls and joking to one another. At times you feel like you are wasting your time but, God didn't put that in his word to stop speaking if they arent listening. Just keep talking and maybe at sometime in the future the Holy Spirit will move on one of them and cause them to bow the knee.
Mat 24:38 For as in the days that were before the flood they were eating and drinking, marrying and giving in marriage, until the day that Noah entered into the ark...
Always give the Gospel to the perishing.