Leggings That Don't Stretch

I’ve had several pairs from Mint Velvet that I would recommend.

I have some of those Joseann which I use in the gym.
....Mine are still too tight! 😂

Here

I think this is the little symbol you need to look out for on tight ones.

I have about 8 pairs of M & S leggings, so I am a bit of an expert! Yes, I know it's a lot, but I am a ballet and dance fanatic.
You need to check the label for the elastane/spandex content. You can tell the difference. For example the ones in the left pile have only 5% spandex and they do stretch and wrinkle.
The spandex ones on the right are 22% spandex, they are shinier and tighter, more like fitness pants, and never go out of shape. However, I use the softer ones for dog walking because they are more comfortable, though I do agree that they get too long and baggy after several wears. They also get more holes in them.

I have also got some M & S leggings that have 'grown'! They fitted really well when I first bought them and I certainly haven't lost any significant weight but the leggings are really loose fitting and far too long. This must have been a particular style/fabric range because I have other M & S leggings that fit really well and keep their shape.

Why not take them back and get your money back doesn’t sound as if they are fit for use