Hi,
I have tried wagi wave in Uk, it was not helpful just a tiny piece of silicon type material for £85.
I have tried botox and therapies in the UK too, nothing was too much helpful.(in UK at least)
the only thing which helped with actual IC (although i am still struggling with positions) was Doctor Pacik No. 06 Glass dilator which I use only 15 minutes with a water-based lubricant and then I am stretched enough and bit confident to do the practical thing.
I also had vaginismus of more than 10 years but Doctor Pacik Dilators and this website helped me to overcome this to much extent.