Hi redvip2000,
The Watchtower organization has never been against the theory of the Big Bang. They don't deny that the universe is billions of years old but then have a huge disconnect when it comes to biological evolution. For some reason the universe can take billions of years to arrive at its current state, but life can only take thousands of years. I always thought that was weird that creation days had to be thousands of years but could not be millions of years.
From the 15 October 1950 Watchtower, Physical Heavens Declare God’s Glory
"This means that these stars are so far away that the light that left them 1,100,000,000 years ago is just now reaching our globe. So in view of such astronomical facts, such distances, how much greater than time and space and all that fill them must Jehovah God be! What powers of communication he must possess! For moment by moment he knows what is going on in the most distant corner of infinity."