eDreams complaint: luggage purchased but not showing on the system when checked in

We have booked a flight to Bucharest, Romania through edreams and purchased a check in bag for the return flight but it was not showing on our tickets received via email. When we got to check in from Otopeni, we were told that we were not allowed any luggage as we have not paid for it and should purchase one. After showing them email to prove that we did pay for it, they said it is not showing on their system so we should pay for it and keep the receipt to claim it back from edreams.
We were charged 60 euros for a bag as it is more expensive to buy it at the airport. I received a msg saying to download their app so I can check in but i could not check in from the app after sepending hours trying to do it. We ended up check in at the airport and got charged 200 euros as we had to buy 5 seats for all of us or no boarding.
I have tried for over a week now to get hold of edreams but no luck as I was sent back and forth everytime. Try to chat online but never got through an agent as got disconnected after waiting like forever to be put through someone so this company is obviouly a massive scam and should be stopped at all cost looking at hundreds of comments online.