Check this out. Globe Telecoms, through its subsidiary Innove was penalized by the court for giving a slow internet connection, contrary to the plan subscribed by the customer. This case clearly serves as a precedent to all other instances when ISP services are blatantly bad.
Here are excerpts from the report:
"They guaranteed me 128 kilobytes per second (kbps) but didn't follow through on their commitment."
"Mr. Darling documented instances within the period of two months in 2005 when his company's GlobleQuest Internet speed ranged only from 55 to 84 kbps. He said he signed up for the service in June that year and had problems with it by August."
"NTC reiterated that internet services providers at the minimum should maintain 99% network/system availability and 98.5% bandwidth (data capacity). The memorandum on service performance standards also says that reported faults must be fixed or acted upon within 48 hours."