On my last trip I booked a hotel through booking.com. When I received the confirmation, I noticed an issue and tried calling customer service - to no avail, after being on hold for 20+ minutes, I gave up. Instead I emailed them, along with a screenshot, to explain/prove the issue. 10 DAYS LATER, they finally replied, telling me, there was nothing they could do, I should have contacted them earlier! Lost money and time, dealing with an extremely condescending customer service. Never again...