Hello Leo
Try a different data centre, but ultimately PAYG customers are at the bottom of the list.
https://learn.microsoft.com/en-us/azure/quotas/spot-quota
Your request will be reviewed, and you'll be notified if the request can be fulfilled. This usually happens within a few minutes. If your request isn't fulfilled, you'll see a link where you can open a support request so that a support engineer can assist you with the increase.