Someday, perhaps Rome will give reading lessons to help. The Scriptures were canonized long before there was the bluster from Rome to claim pre-eminence, but that has not stopped the propaganda from proliferating. Next thing we will hear is Rome wrote it all. But, lean on what you must.
Jesus did not promise Rome anything. He was speaking to some apostles about a gathering of citizens called out. Your organization made up the concept of a Roman Church. But, again, the truth hurts. And perhaps the head was never removed.
I pity you and your desperation