How to get odours out of sofa fabric

Hi everyone. I recently bought a new sofa from DFS. Since it got delivered a few months ago there has been a horrible smell coming from one of the corners. I can only describe it as a gross vomit sort of smell, which I think has maybe come from the packaging materials or perhaps the glue? Has anyone else had this problem? And does anyone know what I can try to shift the smell? I have tried bicarbonate soda, white wine vinegar, and just plain old scrubbing with warm soapy water (three times) nothing seems to work! Any advice will be greatly received as it’s driving me crazy!