When flying, I will avoid using an online travel agency (OTA) as well if I can .
I booking with Gotogate.com, but the flight was canceled. Then when trying to get a refund Gotogate systematically try to stall time as much as possible. You have to call support, and are answered by people with very thick Indian accent which is impossible to understand.
Luckily I had paid with Paypal, so I could request a refund through there.
Unfortunately, when booking flights that needs connections, you have to use an OTA. If one flight is cancelled, the others should be too, which an OTA fixes.