Ah, le sigh.
Consider this,
Most scientists think that everything that we know and experience began with the Big Bang, 14 billion years ago. But how can we have any clue about something that supposedly happened so long ago?
www.bbc.co.uk
"
As Big Bang theory predicts, these ancient gas clouds are made of very different stuff to the modern Universe. Most of the chemical elements in the modern Universe are made inside stars. Because the gas clouds come from a time before stars, they consist almost entirely of the most basic elements, hydrogen and helium."
A proper scientific theory makes predictions that can be tested experimentally.
Newton's three laws of motion weren't proved wrong by Einstein; they were refined and expanded upon. If we successfully expand upon the big bang theory, that will not prove it wrong either.