One advice: avoid these gangsters!!!! Big Scam!! On 12/02/2019 I made a mistake in the date while booking my flight tickets to Singapore through the Opodo website: I booked flight for 23/02/2019 instead of 23/03/2019, back on 08/04/2019) . Of course it's my mistake and I am not denying my liability. When I realized my mistake on 16/02/2019 (8 days before the flight date), I tried to call them like at least 25 times in one week, different timing ... nobody answers, getting this endless repeating music waiting tone ... until suddenly someone picked up my call (18/02/2019, very noisy call center in India) to tell me there was a technical issue with their server and could not help me out as they could not connect to their system and I should try to call later!!! I tried again every possible way to contact them before the flight date but could never reach them. When I tried several to change or cancel my booking I got a message that it was not possible to do online and I should call their help desk which was not answerring my calls until 2 days after the flight date (25/02/2019) I finally reached someone from their helpdesk stating me that they could not do anything as I informed them after the flight date and it has been considered as a 'no show'!!!!! No any possibility to negociate, to get a refund or even a commercial proposal: NOTHING AT ALL! Conclusion? As it was a 2 way ticket, my flight back was cancelled by them automatically and I had to purchase new 2 way tickets: I lost about 694,15€ because of their not professional behaviour. I made several claims with proves of my calls, emails sent, ... and always get the same answer: can not change anything, I have to pay. But of course meanwhile, they keep harassing me with at least every 2 days promotional emails. SHAME ON YOU