Complex sentence: Learning that his men are overwhelmed, Gamieux calls Rafi to abort the transfer but he refuses, and Gamieux will not help him anymore and Rafi threatens to take down with him for the attack that they made if Rafi apprehends.
Split into simpler sentences: Learning that his men are overwhelmed, Gamieux calls Rafi to abort the transfer but he refuses. Gamieux tells him he would not help him anymore and Rafi threatens to take down on him for the attack that they made if Rafi apprehends.