Appalling! Booked with Opodo, including their cover for Flexible Travel dates. Have just spent to whole evening trying to contact them to rearrange my flight as covered by the Flexible cover. Am informed on their website that this can only be done by calling them. Attempted to call (22 times in total). The calls are simply dropped. Got on their 'chat' facility, which gives you Kris, a bot. Eventually get past him to a 'human' agent, who can only tell me to ring the same number I've already rung. He says the call centre is not authorised to rearrange flights. He does give me a link to complaint to. I go to that link which, guess what, links me back to Kris, the bot! Obviously, there is no email and, as other reviewers have said, the system is clearly designed to block and frustrate anyone seeking refunds etc. I've no choice but to book my own alternative flight separately. Any attempt to recover the cost from Opodo will be similarly blocked and frustrated. My advice is that you avoid Opodo at all costs. Meanwhile, I will be (a) reporting them to the FSO (UK) for mis-selling a financial product (their Flexible Travel product) and (b) submitting an online Money Claim for the reimbursement of my additional flight costs. Its a simple legal process for small money claims, to which companies are legally obliged to respond. That usually makes them just pay up!