netgear netgear destroyed my internet capability when I downloaded their updateand wanted me to pay them before fixing it Internet

 In Nov of 2016 I received a notification from netgear to update my usb plugin. When I I downloaded their update,I Iost the internet and my computer was full of wavy lines. couldn't access anything! Upon calling the netgear customer support a man from India said my plugin was out of date; but they could fix it for $89 to $286. I told him that everything was working fine until I downloaded the netgear update and that he deliberately broke it . He said sorry, but I can't help you until you pay us. I use my computer for business and was down for most of the day. I was not ready to pay someone for breaking my service and loss of business! I hope a million people read this and netgear gets blindsided by lost business! Thanks-disgruntled.