I don’t think that’s how it works; you don’t just somehow get money because your ISP is being stupid. Maybe if, through years of expensive legal battles, you could demonstrate some damages and get a favorable ruling, but not because you have a recording of some incompetent customer service rep saying “don’t torrent”.

Also, be careful about taking advice about recording people from random people on the internet. A responsible person should tell you that different states have different laws around potentially requiring you to inform other parties that you’re recording them. You’d feel pretty silly suing your ISP based on a recording that was actually illegally created.