Part of my flight was cancelled made my own way to LHR. Was told ticket needed reissuing by Opodo who then told me after 30 mins on the phone airline changed flight so they have to reissue. No one could tell me why it was being reissued and both companys (Qatar/Opodo) wanted to charge me again for a ticket I had aready paid for? Ended paying but by this time missed flight. NEVER AGAIN still trying to find out who, if anyone has my money.