Mapale Black Wet Look Strappy Bra Set

I am a size 6 around my waist, but a 10 (ish) around my chest.The knickers are slightly too big (as to be expected), however they are still sexy and good quality (I have worn and washed many times now)The bra, for me, needs to be pulled tight together, or I fall out of the bottom of it! It's very flimsy and isn't the right fit for me, so makes me feel a little uncomfortable, however I have had many compliments on the way it looks.The neck thingFor me, was far too big. If I tied it with the lace bits, as intended, it sagged. If I tightened it and tied with the material, it twisted