Hi tengo tadumadze,
Thanks for getting back with detailed explanation. Here is the information about it.
If your account has non-payment or billing issues, your access to all resources could be suspended.
If the server is accidentally deleted or deallocated, may make it unavailable for reallocation due to high demand for GPU Instances.
If there are any Policy violations your access may revoke. If the region your server has runs out of capacity or faces outages you may lose access temporarily. Check quota renewal policies and ensure renewal requests are submitted on time.
For more detailed information, please check Azure subscription and service limits, quotas
If you have any further queries, please let me know.