I wouldnt play with it your self any more until you get a refund or have it fixed, dont tell them you have tried other subs dont say nothing like that just go back say this is a bullshit install and your not happy take photos of the exposed wired bad earth and anythign else that is wrong send it with a big email to head office of alberts and then call them to confirm the email.

once u have it solved go see alberts in morley and see grant he is a champ and has always looked after me. So i would trust them

hope it works well for you mate