The only thing you have done is to prove that unconverted Jews continued to worship on the last day sabbath as was their custom, and that Paul went into their assemblies to preach Christ to them.
Until you can manufacture such a verse to the contrary, I think you ought to admit the case.
I need to show no such verse to prove my case. In fact, the ABSENCE of a verse contradicting the 4th Commandment of God's Holy Law is my proof. Because Scripture teaches that anyone who contradicts scripture "has no light in them".
How about Priscilla and Aquila hearing the preaching of Apollos in the synagogue. It would seem unlikely they would be listening to a Jew speaking there on a "Sunday"!
Aquila was a baptized Jew and he and his wife appear to be celebrating the Sabbath.....in the synagogue....listening to a Jewish preacher.
Yes you do, because it is yur contention, contrary to the teaching of the universal church, that Christians are to continue observing the shadows of the old covenant wrt the weekly worship. That we are to worship on the day of the Jews, in the manner of the synagogue of the Jews, not on the day of the resurrection of the Lord of the Sabbath. You need to redefine the practice of the apostles as we see them in Acts 20, where the church gathered to worship and break bread on the first day of the week.
You need to prove your point very deliberately. That you canot do, at least not to the satisfaction of most of God's people. The religion of Ellen White is not the religion of the Bible.