Why did our flights to a wedding end up such a nightmare?

eDreams messed up a surname, and our flights were cancelled – we want a refundMy partner was to be best man at a wedding in Malaysia, so we booked tickets to Kuala Lumpur through eDreams. The outgoing flight was with Saudi Arabian Airlines and the home flight with Oman Air. The next day, we realised that my partner’s surname had been entered twice on the ticket. EDreams insisted it could not be changed so we had to cancel his flights and buy new tickets, receiving only a partial refu