Vientian appointments are full completely !

I am shocked to see that for almost 3 weeks in advance their schedule is full. Not only that, people actually book everything on Mondays-Wednesday and leave only Fridays free (so you wait the whole weekend). Is this system getting updated ? Is there any way to pay and get it earlier ? We are going to need to stay there for a week because Thai visa finishes 6 days before the open slot. wow.