Hotline & address Our customer service is available Monday to Friday between 8 am and 6 pm.     Free hotline 0800 300 250 From abroad +41 41 560 69 02     Free fax 0800 300 151 From abroad +41 41 560 69 35     Postal address TalkTalk Telecom LLC P.O. Box 1359 CH-6301 Zug