Customer Service for Corporate Customers (of Medium Voltage) Home Page > DIRECT ACCESS TO SERVICES > Where to Find Us > Customer Service for Corporate Customers (of Medium Voltage) Customer Service for Corporate Customers (of Medium Voltage) If you are a Medium Voltage customer you can contact the following services: Διεύθυνση Τηλέφωνο ΦΑΞ E-MAIL Corporate Customers of Athens 5-7 Aristeidou st., GR-10559 Athens +30 210-3253378, +30 210-3287150 +30 210-3287149 Paraskevi Οikonomou p.oikonomou@dei.com.gr Corporate Customers of Lamia - +30 210-3253378, +30 210-3287150 +30 210-3287149 - p.oikonomou@dei.com.gr Corporate Customers of Thessaloniki 22 Andrianoupoleos st., GR-55133 Thessaloniki +30 2310- 431435 +30 2310-454343 Εfstratios Garitsis e.garitsis@dei.com.gr Corporate Customers of Larisa 165 Iroon Polytechniou st., GR-41223 Larisa +30 2410-230380 +30 2410-555418 Τriantafyllos Lelentzis t.lelentzis@dei.com.gr Corporate Customers of Kavala 38 Tenedou st., GR-65404 Κavala +30 2510-600356 +30 2510-242710 Paraskevas Κeskesiadis p.keskesiadis@dei.com.gr Corporate Customers of Alexandroupoli 24 Kapodistriou st., GR-68100 Αlexandroupoli +30 25510-84596 +30 25510-83896 Εvangellos Skevas e.skevas@dei.com.gr Corporate Customers of Kozani 26 Vermiou st., GR-50100 Κοzani +30 24610-39073 +30 24610-35044 Αthanasios Κaratsoulas a.karatsoulas@dei.com.gr Corporate Customers of Patra 15 Akti Dimeon st., GR-26222 Patra +30 2610-333542 +30 2610-343247 Αntonios Lymperis a.lymperis@dei.com.gr Corporate Customers of Tripoli 2Α Alex. Soutsou st., GR-22100 Τripoli +30 2710-230336 +30 2710-232070 - a.lymperis@dei.com.gr Corporate Customers of Ioannina 4 Christou Katsari st., GR-45221 Ιoannina +30 26510-26791 +30 26510-72354 Αthanasios Vlachogiannis a.vlachogiannis@dei.com.gr Key Account Customers 22 Chalkokondyli st., GR-10432 Αthens +30 210-5225873 +30 210-5230479 Μania Μanioti e.manioti@dei.com.gr Accounting Management 5-7 Aristeidou st., GR-10559 Αthens +30 210-3317152 +30 210-3287220 Εfstratios Sperantzas e.sperantzas@dei.com.gr