Mytrip.com complaint: Customer service and refund due

We booked our flights through mytrip (and will never use again). We called them a couple of weeks ago to change the date of our return flight. We had paid an extra amount to mytrip to make our tickets flexible, which means we were allowed to make changes to flights without paying any change fee. After spending one hour on hold, the agent advised us that he had completed the date change as requested. We then received an email from Ryanair a week later reminding us to check in for our return flight – clearly the change had not been made. We then called mytrip again and spent another hour on hold. We were then told by the agent that there was an issue with the Ryanair website and that’s why his colleague couldn’t change our flight. We were told the colleague had emailed and called us to advise us of this but that was not true. This colleague then tried to make the change and told us that the website still had an issue and we would have to call Ryanair directly to change our flight as they couldn’t help us. (Absolutely appalling customer service). We then called Ryanair (another hour long wait) and were told that if we wanted to change our flight we would have to pay a change fee of €45 each. I told them our ticket was flexible and shouldn’t incur fees but he said we’d need to speak to mytrip about that. Even finding a way to make a complaint to mytrip has been impossible! I have never experienced such bad service. We expect a full refund and compensation for the inconvenience.