You didn't debunk one of nature's Laws using a theory~ Law/Principe Of Causality

Sounds like maybe an interesting conversation.

it has been. I can silence them my friend.

the universe has been observed to be expanding, it has been determined that it had a beginning. This is where the Big Bang is introduced as a plausible theory. However the big bang fails to address the Prime Mover or Fist Cause. you see, Casualty is essential to all sciences. First cause is one of the essential natural laws that govern the universe.
An atheist responded to a blog that I wrote on the subject of The Law Causality. He responded with," First cause has been debunked." God is staring them in the face,deal with it.

"First cause has been debunked"?

they are quick to make that claim. But when you examine what they mean by debunked, you will see that it is not what you thought.
they have simply created another implausible narrative.

the big bang is out of quantum physics. However some academics wish to stop at that point, the big bang.What they dont tell you is that the quantum equations mathematically predict and infinitely dense and small eternal first cause of the entire cosmos.
atheists only use part of the string and singularity theories which both predict an all in all, eternally existing first cause.
So, to answer your question....NO, The Law of Causality has not been debunked.

I didn't follow all that reasoning, but I'll take your word for it for the moment. :)