Good Morning and welcome! I am Dr. Loretta, a licensed veterinarian and I am happy to answer your question.
I am so sorry to hear about your situation...I know this can be very frustrating.
Most of this is caused by lack of obedience and it is very important that you take Oska back to an obedience school and do thsi training so that when he does something that is not good, he will listen to the "Quiet" command.
Most trainers will tell you to take Oska out for many walks to tire him out. Also, it is helpful to try to desensitize him by socializing Oska so having people in your house will not cause this incessant barking.
This LINK will show you tips.
This LINK will give more tips.
Bark collar are very effective if these other tips are not effective. LINK These are not cruel but get the point across.
Does that make sense to you?
Please let me know if you have ANY other questions. My goal is to give you 100% satisfaction and if you are not yet satisfied, please REPLY so I can clarify for you.
Sincerely, XXXXX XXXXX