I would of thought the most sensible option and simplest and cheapest fix would be to add a matching sized press stud base an inch or two further along the hem to allow the existing press stud top to fasten slightly further along taking up the excess? There's plenty of videos on YouTube showing you how to do it or alternatively get your local cobbler or sewing repairs & alterations type shop to do it for you (it's a 2 minute job).
As always trying before you buy prevents these type of problems and you did have the option to return them before wearing them outside.
Why are people assuming I didn't try them? Amazon prime is a wonderful thing. I really thought i remembered deluge having this adjustment on them. I often saw them in blacks/millets, but they only do sizes in 'small' or ''medium' etc, not waist and length, so I went with Amazon. It was perfectly fine and theyre now returned.
I really just wanted to know if anyone knew of some others with the adjustment.
Geez