Menstrual Cups - Divacup, Mooncup, Instead, Lunette, Miacup

Hello. I have been trying Lily Cup for about 4 months, and still have leaking. Ive seen tutorials and read all posts. Im 35, no children.
When i insert the cup im sure its open, and well positioned by touching my cervix. Allthoug, I fell the cup walls flatenned. I dont know if maybe may walls are to tight and I need a stronger cup. The cup never gest completly full.
Thanks for your help :)

Two pretty new cups, Rainbow Jolly with a blurry rainbow print, and Rainbow Lines, with more separate colours. :-)

ttps://www.yuuki.cz/en/eshop-menstrual-cup-rainbow-line-detail-486
https://www.yuuki.cz/en/eshop-menstrual-cup-rainbow-jolly-detail-485