@Abi Have you tried changing the needle?
I had to look up what the Flower Presser Foot was. It looks cool. Given it is turning the fabric, have you got the feed dogs down, also it might work better if you use smallish pieces of fabric, use a sturdy needle and not go too fast.
Is it a flower foot deigned specifically for your machine or some generic make?
I had one of these years ago, I remember it being a bit temperamental. I think I got it working well when I realised the fabric needed stabiliser. I used machine embroidery thread which is finer & more slippery than sewing thread, used the same in the bobbin (this was before I had an embroidery machine so I'd not heard of bobbinfil). Reduce the top tension & try with a #70 needle. I remember using an embroidery hoop to keep the fabric from bunching up.