Doorbell Pro mic useless

If someone rings the bell fine, it records motion etc......problems are you can't hear or talk to the person....sound drops out crackles you get a buzzing constantly, its been like this since I got it, I heard it was samsung fault so didn't worry......well iphones have it ipads, Echo Show...other androids........does anybody have any ideas or fixes, spoken to tech no help at all never did anything to really help me out.