html meta tags not inherited in frameset's parent

I'm trying to make a webpage responsive which, by itself, works, but namecheap (which redirects to hopto (no-ip.com)), embeds everything in a frameset:

<frameset rows="100%, *" frameborder="no" framespacing="0" border="0">
        <frame src="http://kmouratidis.hopto.org:8081/" name="mainwindow" frameborder="no" framespacing="0" marginheight="0" marginwidth="0">
    </frameset>

which in turn means that the inner meta tag for checking viewport doesn't affect the outer frame. I'm pretty sure this is the intended behavior, I just want a suggestion as to how to solve this.

Printscreen (sorry, can't get view page source and view frame source to work well together) of what the whole code looks like

You can't control the HTML generated by your domain masking service.

You can't manipulate the DOM of that document later.

So: Get real domain hosting instead of using a masking service.

No-ip.com will provide that service.