Service was polite
1. We drove out of London St. Pancras to Inverness with a car that was rented out to us with a punctured tyre, no quality checks what so ever from Sixt. We made it to Inverness by refilling air multiple times and called Sixt for aid once we reached. Despite having full insurance, Sixt was unable to repair the problem or send us a new car until more than 24 hours later which would have destroyed all our plans for this trip. 2. We were then asked to pick up a new car from Inverness airport from Europcar by Sixt as they couldn't fix the matter in a timely fashion. We were told this would be free & insured due to our existing contract with Sixt. When we reached the airport, we were told by Europcar that no approvals had come through from Sixt. We called Sixt and were told approvals were pending in the back end and we would have to pay Europcar £250 for a single night out of pocket despite having full insurance. Sixt also told us that our contract was to be extended for the remaining 4 days the following morning by Sixt based on the original reservation we had with them, with Sixt covering the cost for the remaining days. Sixt would then reimburse us for the £250 once their managers came to work the next morning. This was also sent to us via email in writing. 3. The following morning we received an email from Sixt's claims agency confirming our reservation had been extended by 4 days. However the next day, we realized Sixt had authorized Europcar to charge £1000 to my credit card with no notice or authorization! Sixt had in the back end switched that 4 day reservation to my card without asking or notifying me after sending a confirmation email saying they would cover the entire reservation with Europcar. 4. Despite hours spent on the phone and on hold, there was nothing Sixt or the claims agency could do to reverse the unauthorized charge. We reached Edinburgh the following day and we're told to swap out the Europcar vehicle for a third car from Sixt to stop Europcar charging our credit card £250 per day. 5. Sixt did not have a car ready for us. They had closed our original booking just 30 minutes after the original pick up. It took us 3 hours to get a car and complete the paperwork, all on top of the time taken going out of our way to the airport. 6. We are now in the middle of the lengthy process of trying to get reimbursement for all the additional money charged to us due to the fact that Sixt issued us a faulty car they were unable to repair or replace and moved our booking to competitor at the obscene rate of £250 per day where we charged without authorization for additional days. Instead of celebrating a momentous family graduation, much of our holiday was spent on the phone and at airports dealing with a callous company with ineffective and inefficient processes.