Terrible untrustworthy company. I would not recommend booking with them. They will tell you that something has changed or is no longer available for your booking and then they will charge you more for the change. After they've got your money they do not comply with their own terms and conditions or even ABTA guidelines, so won't provide a provide a proper refund for cancellations, I doubt that they will honour any credit "vouchers", certainly without demanding more money for the same thing. If you have an ongoing cancellation dispute with them then report to ABTA, Trading Standards (via Citizens Advice), Competition and Markets Authority, any Consumer Group (Money Saving Expert, Which?), any intermediary that you bought through (Groupon, Daily Mail, etc.), add reviews to as many forums as possible. It appears unlikely that we'll get proper refunds without legal action, but Trading Standards and the CMA are more likely to take action the more reports they get.