First, and most importantly, you must not enter into spiritual warfare with a demonic presence by yourselves. Doing so could make matters worse and empower the demon.
Calling in a priest or pastor who has no experience in such matters could also make things worse. So having an ordinary priest or pastor simply bless the house will not solve the problem. It may temporarily put a halt to whatever is happening but it won’t end it.
Contact a priest or pastor who has experience in these matters. He will explain what needs to be done. Together with him, your family must claim authority over the house, your lives, whatever it is that is being affected.
Finally, your family must be spiritually prepared to take action. Don’t take action until you are spiritually confident in your ability to do so.
I just told my brother he needs to involve his Priest. If his Priest doesn’t want to get involved, go higher.