Where to apply for an airport transit visa?

My place of residence My visa application should be submitted to
Tunisia Embassy of Switzerland in Tunis  (until 02.09.16)
Tunisia  TLScontact (from 05.09.16) 
Libya Embassy of Switzerland in Tunis (until 02.09.16)
Libya  TLScontact (from 05.09.16) 

Appointment at the TLScontact center

TLScontact can be contacted by: (+216) 31 369 033 from Monday to Friday, from 08:30am to 04:30pm.

You'll be asked to indicate your phone number and a call center operator will call you back in regards to your queries concerning the visa application process in Arabic, English or French.