Google contact needed to help resolve captcha issue

Hi. We have a customer who have their /32 IPv6 block captcha blocked, and also their /19 IPv4 have been blocked with captchas. The big issue is that it doesn't help to solve the captchas, there is a new one directly after and solving it gives a new one and so it goes on till you move to Bing do do searches. Even parts of their netblocks that arn't in use are blocked, and have been for 3 weeks now. We have tried to contact google, but no one gets back. There is no useful information on how to solve the issue either. Would be great to have a tool like SPAMhaus or other RBLs, where you as a ISP can see the offending IPs and take care of the problem (if there is one). -- Fredrik Holmqvist I2B (Internet 2 Business) +46-70-740 5033