What legal action can be taken if the opposite party does not receive summons?

I was married in March 2023 in India and moved to Denmark with my husband as he is working there. I returned to India on August 2023. Since then I left my in-laws house and got separated from my husband due to abuse and torture for dowry by husband and in-laws. I filed a case in October 2023 for maintenance in the family court. Since October 2023 the court has been sending summons to my husband. Postal summons were returned stating incorrect address, summons sent in Gmail -no response, summons sent in WhatsApp -left unseen, summons sent via hand notice was not accepted by his parents. He is no longer in India. He is currently residing in Denmark. I am not sure if his Denmark address. His parents refused to take the hand notice and threatened that they are shifting their house. It's been almost 1 year and the notice has not been served to him. The case stage is still in notice. Please advise what action has to be taken.