2018 Lexus RX 350 Wiring Harness through Firewall

[petsthphilly]

Please Help this is my first post on a forum. I just bought a 2018 Lexus RX 350 F Sport and I was pulling a 0 gauge wire through the firewall grommet on the Driver side. Apparently I ripped some wires in the grommet on the main wire harness. The dealer says I need an entire harness and they want $17,000 to do this. I almost had a heart attack when I heard this. Someone please help me to get the harness loose so I can repair a couple of wires that were torn. I’ve had the worst luck this year. I lost my dad, my dog, my twin brother, then my apartment burned down 6 weeks ago the same time I was buying this Suv. I have barely any money left and don’t know what to do. These are the photos the dealer sent me and they won’t give me back the car until I pay them $725 for diagnosing what I already knew was wrong. Thank you all I really appreciate it a lot.

Pete