Hi there Hugo Souza Almeida
Thanks for using QandA platform
This maybe due to the deletion of the storage account and the server being set to private network access., check the database's status using the Azure portal make sure it is still functional.
If the issue continous i suggest you to, raise a support ticket with Azure Support to forcibly terminate the operation link below
https://portal.azure.com/#view/Microsoft_Azure_Support/HelpAndSupportBlade/~/overview
If this helps kindly accept the answer thanks much.