Shameful service

Do not book your ticket through Flight Network/Skyscanner! They sent me an email on the 4th of February saying that my return flight has been cancelled and that they can refund or move the flight. I replied, and sent another email, and another email, and another email, which they ignore. On the email it says I need to reply within 5 days otherwise they see it as a "no show". It's now 6 days and they have not replied. I don't have a number to call them. This is shameful.