Fix my m/c won't spin full load?

Hello there, I have a Samsung 7kg washer, which stops for spinning.it keeps displaying uneven, yet makes a screeching sound like it needs a good wd40 spray in the bk, or like a belt tightening( if they have one) will spin with slight noise with no clothes in, yet as soon as I put clothes in, no spinning.??? Do you have any ideas, would be much appreciated. Have done all the basics of filters and hoses too...
Thank you kristie