Sansui speaker not working

I bought a Sansui sound bar in Feb 2021, since then I have returned it twice for a new unit. I am on my third system and it still have the same problem. I had to return these items every time on my time and my fuel to get to your store and get this item retuned just to get another unit with the same problem. I am so sick and tired of this!! I never had a problem like this with any sansui product. Please help???