Front diff blew and Polaris would not cover 300 miles!!!!!!!

I have had my rzr for under 300 miles i replaced my a arms with super atv ones and they are great nice heavy duty way nicer than the stock thing metal a arms. Long story short they blamed it on the a arms and would not cover the front diff which made noise from when i bought it last Polaris i buy!! There customer service sucked so disspointed in them.