Amaryllis ladies bikini top

I bought this alongside the bottoms. The bottoms are fine but the top is not as well thought out. It lacks any structural integrity meaning it's a top for lying by the pool and not being active - I wore it swimming last night and had to readjust after every single length. There are pads within the cups which keep sloping off to the side/underarm. Overall, the top is disappointing. I would probably suggest sizing down.