...have you tried accessing it using a different browser? Alamo's website does have issues, but you should definitely try a different browser, just in case. I have encountered difficulty accessing other car rental sites using Chrome, but for some reason they work just fine using Firefox... fyi and fwiw...

I have expressed my unhappiness on a number of occasions with Alamo's website with customer reps, and honestly, it seems to fall on deaf ears. I have zero confidence my comments are passed along.

On the positive side, every rental I do have with Alamo, has been great, from the kiosk, to the no charge deposit policy, to the cars, to the pricing. It's just the booking hassle on their website, I find, getting the dreaded red notice that coupons are expired when they haven't, etc.