I wanted to start an important and contained thread for customer service hotlines that speak in English.  While I recommend people to learn Korean the best they can out of courtesy of teaching a foreign language, it still is important to have this when dealing with important and confidential issues.

KT Internet 1588-8448
SK Telecom 080-252-5011
Nonghyup Bank 1588-2100, then dial extension 730, then 1 for English

If people have more English customer service lines, please post them here and I will update this post to avoid scrolling down  but I will still give credit to those who post it.  Thanks ^^

Number posted above already for any translation issues but here is more information:

Whenever and wherever in Korea, if foreigners encounter communicative problems in Korean, they just need to call 1588-5644 (no area code is necessary), and they will be connected to one of the BBB (Before Babel Brigade) volunteer interpreters. It does not matter where they are as it covers the whole Korea peninsular.

· Whenever: 24hours / 7 days
· Wherever: Airport, Restaurant, Drugstore, Hospital, Taxi, Hotel, Tourist Place, Shopping Mall, Market etc. anywhere in Korea

http://www.bbbkorea.org/eng/