You're both screwed. You need an ECU. Same thing happened to me, and I tried literally EVERY avenue to save it. The worst part about my case is that while I was having exhaust designed for my car the fabricator left the trunk open, killed the battery, and fried the ECU while trying to jump start, then refused to take responsibility. My local Lotus dealer Ferrari Bentley Lotus of Denver took care of me, I was able to source a new ECU from an online dealer for around $950 shipped, and they slashed the installation cost to $100 flat rate. I then told the fabricator to pound sand when he handed me a $1000 bill for his work, so I came close to breaking even.