Shocking non existent service fro Hertz Car Rental

We booked a luxury car online on the 16th of October for the 22nd and 23rd of November. So more than one month prior to collection date. We got a e-mail confirmation of the reservation.. We even double checked with De Waterkant branch where we were supposed to collect the car from, that they have the booking which they then confirmed. Today, one day before collecting the car we just wanted to check all is in order. Just to be told that there is no car available. Nothing, sorry we cannot help you anymore. This was booked and confirmed more than a month ago. No one informed us, nothing?????? What if we did not check-in with them to confirm all is still in order?? We would have arrived at the De Waterkant branch only then to be told sorry, no car available. We have all the names who and when we spoke to them, e-mails of confirmation etc available for anyone who wants it.