Rhonda Shear bra does it curl up at back fact or under

I bought them and sent them back, I had to pay to return them. I should have burnt them. The curl up so bad, no support, no quality.

Watching the presentations it seems as tho often they are in fact riding up or folding over, cutting in or just plain not overly comfy.

All her bras that I have bought roll up! Tried several styles and they all have rolled up. I