The bereaved mother of Reeva Steenkamp said Oscar Pistorius escaped justice over her killing, which she said was "no accident".
June Steenkamp made the claim as she comes to terms with the end of the trial where Pistorius was found not guilty of murder but guilty of culpable homicide.
The 27-year-old claimed his girlfriend's death was an accident caused by him wrongly thinking an intruder was inside his toilet.
But Steenkamp said the "truth" had not come out at the trial in which Pistorius was criticised for presenting conflicting evidence and being unreliable.
Speaking ahead of the runner's sentencing for culpable homicide and one gun charge, Steenkamp said: "It's sad, you know? Because you want that for Reeva, justice for her.
"She died a horrible death. A horrible, painful, terrible death. And she suffered, you know? And he shot through the door. And I can't believe that they believe it was an accident.
"There's never going to be closure. Especially now with this verdict. How can there be closure? She's not coming back. We just have to try and move on with our life, you know?"
Steenkamp said she intends to devote her time to opening refuge centres for battered women looking to escape domestic violence in South Africa.
She said the trial has left many unanswered questions. "I wanted the truth, I don't think we got the truth. That's the whole point. We did not get the truth," Steenkamp said.
Pistorius is due to be sentenced on 13 October.