Well after 9 days of emails to Sixt I’m yet to get a suitable reply, nor have I heard back from complaints or customer services via the phone as promised by the CS agent I spoke with. I made a car hire booking, 9 days ago someone (not me) cancelled the booking as soon as I saw the cancellation email I emailed both reservations and cancellations saying there has been a mistake. 8 days later not a reply to resolve the issue, I had to call a USA number to be told a supervisor will call me back - no phone call. I have emailed again saying this could be a data breach or an internal issue - but no reply. Is is a coincidence that the same booking that I had booked for $980 is now over $3000 for the same period. Do not use @sixt as they they have no care for their customers