I am very disappointed with my recent experience with FlixBus. I received an email from FlixBus stating that due to the cancellation of the DB Regio (German railway company) connection between Mannheim and Heidelberg - which was sold as part of my FlixBus ticket -, I would not be able to make my connection with the FlixTrain from Mannheim to Erfurt. Although this was clearly FlixBus's responsibility, the company refused to take responsibility. Instead of refunding my ticket, the company simply referred me to DB. Customer service is just as frustrating: at first, they said that no such email had been sent. After I sent them a screenshot as proof, their responses seemed like standard templates and did not address the actual content of my enquiry. Instead of solving the problem, FlixBus is shirking responsibility. Unfortunately, I also had problems on my penultimate trip, as the return journey was completely cancelled. Due to this repeated unreliability and lack of adequate customer support, I cannot recommend FlixBus at all.