[anti-abuse-wg] What to do when both RIR and ISP don't care?

     I have first to say sorry to this mailing-list, as this mail
isn't related to RIPE but rather to LACNIC.

     I've traced back some hacking from an IP address (200.113.126.76)
in an ISP (Telefonica Empresas).  I've sent an abuse complaint to the
only email address available (sescobar at isp.tie.cl) in LACNIC Whois but
visibly the ISP didn't care and nothing was done.

     Then I had but to send another abuse complaint to LACNIC
(abuse at lacnic.net).  The only answer I got is an automatic message
saying that it's not their responsibility at LACNIC to investigate
abuse issues.

     That's really a bureaucratic act!  What could we do in such situation?

PS: Really sorry that I have to bring this issue in RIPE because in
LACNIC website, there's really nothing to help users like in RIPE
where you have a mailing-list, or like in APNIC where one could report
invalid WHOIS info.