AN ABSOLUTE WASTE OF MONEY! NOT COMPATIBLE VIA INSTAGRAM.

I'm so so annoyed. Having just spent a huge amount of time and money getting a website set up, when you link the website from an Instagram Profile, all formatting goes out the window. Entire blocks of text are not visible as it seems to treat it as a desktop site rather than a mobile format. Please tell me there is a way to change this?? Otherwise the entire theme is completely redundant as it is not fit for purpose, or truly mobile friendly.