eDreams complaint: Unable to speak with an agent re class of booking

I booked what I thought was a ‘premium economy’ seat from London Heathrow to Cape Town and paid £1408.52. When I saw the ation, I was perturbed to see it was booked in ‘economy’ which I thought was a mistake. I immediately contacted eDreams to that I was booked in the correct class and received no reply. I tried for two hours yesterday to try to speak with an agent to find out what had happened. I keep getting referred back to a robot. Finally exasperation I cancelled the flight unable to check the terms and conditions with an agent. I have now received notification that my refund is £175.11 which does not even cover the taxes. So I am left without a flight which I need, I tried to stop the cancellation and reinstate the flight to no avail. My husband is 81 and does not wish to fly economy. I cannot get hold of anyone to speak with them