Before pulling the alarm, just look at the paiements : https://ird.uvac.fr/#payments.
If it's stuck, that's because sometimes something goes wrong and the dev have to understand what's happen and try to repair...

There is also a contact page : https://ird.uvac.fr/#support with a mail... this is supposed to ask someone something related to the site and supposed to be answered. Actually, this link arrive directly in my mails. so next time, send me a message and tell me what's wrong, I surely will find a solution.

your paiement should arrive now.