www to non www redirect in htaccess not working for subdirectories / pages

[tstdom22]

Hi,

I've added a redirect for http to https, which is working well.

But when trying to redirect www to non www, this only seems to work for the top level domain name.

IE:
http://www.phantomvaper.com

Redirects to,

https://phantomvaper.com/store

This is the intended behaviour. However, the following redirect wont work...

https://www.phantomvaper.com/store

To

https://phantomvaper.com/store

I have tried every combo I can think of but just dont seem to be able to get the intended every page redirects to https and non www.

Can anyone shed some light please?

Thanks,
Shaun