Amp and Sub issue

Yeah i have a big problem question. I just hooked my amp up and my subs and they worked fine i dont think it was grounded well and i hurt a loud squeal. My amp light turns on and stays lit but no sound comes out of the subwoofer box please help me.. are the subs blown or is the amp broken which one. I must know so i can yell at the people who sent me this ****.. THank you please help me:smash: