That sounds pretty grim and what they say does not add up.
Do you have screenshots of T&C's or were you only ever told of
WR through chat?
I think once I had met the original
WR I would of just made the deposit and then tried to withdraw to see what happened.
If the withdrawal was denied you would have an even stronger case.
When you questioned why the
WR was different they gave you different and seemingly spurious answers which would suggest the deception was a deliberate attempt to keep you wagering until you lost it all.
You had a freakish run of fortune that they were not prepared for and they now want to wriggle free from their obligations.
Good luck and thanks for the info.Warning received.