eDreams complaint: Appalling service resulting in severe anxiety

I booked a flight with edreams to Fly with KLM from leeds to Amsterdam. When checking in KLM refused to accept NHS lateral flow, despite no correspondence to advice this in advance. I had a fully vacinated Covid pass, a negative test with me, a ation of a negative test and test that I was willing to do in front of them. They refused to let me board. I had paid for flexible flights so tried to contact KLM to transfer to next flight so I could get a face to face test, but KLM advised this had to done via edreams. I tried everything to get in contact with edreams but it was impossible. The chat bot was totally useless, as was the website and the App. I eventually found a contact number which was very hard to find but was kept on hold for 1hr 45 mins before getting cut off. I had to drive to another airport and pay for another flight myself and additional parking at another airport. The next flight was with easyjet who had no issue with the test I had. The stress this caused due to not being able to get any support from edreams was immense, not to mention excessive extra cost. The flexible flight insurance is totally pointless and additional waste of money.