Customer service phone number is +44 20 7660 2213. I post it here because it requires advanced investigation skills in case of emergency such as rebookings. Which, just notice, will not be handled by the agency. I had my flight cancelled and the day after on edreams still the reservation appeared as ongoing and completed. I spent 2 days over the phone, I had to send them the cancellation proof received by email and the optioned flight agreed with the flight company; the agency denied to issue the electronic ticket for my rebooking (as I said everything had been already handled by the flight company; edreams was just supposed to accept the flight change and they kept changing my flight plans. I managed to request my rebooking ticket directly to the flight company after hours of pushing and chasing. Extremely stressful situation: DO NOT BOOK TROUGH THE WEBSITE.