Adding code to use a different version of a font uploaded to website

I have duplicated a website to re-brand. I used a font that was available on Canva but not Squarespace so I purchased the font. Unfortunately, the font I purchased and the only version available (Catchy Mager from fonts.com) is different from the one on Canva - and my client doesn't like the ligatures so I need to 'add the code in your CSS file for accessing the open type feature' and ive been sent this link https://helpx.adobe.com/fonts/using/open-type-syntax.html#salt which makes absolutely no sense to me. Apparently, the font is available without the ligatures if I add some code. I would rather not add code that renders the site outside the support of Squarespace, as my client needs to be able to access the help & support if I'm not available. So can I add it to the same part that I added the font to in the first place? in the design section - custom css as it does not seem to upset Squarespace here.

Hi,

What is your site url? We can check easier

the site is not connected to a domain but the squarespace url is denim-emu-pygp.squarespace.com

On 3/20/2023 at 9:07 PM, jaggerdesigncreative said:

the site is not connected to a domain but the squarespace url is denim-emu-pygp.squarespace.com

The site is private. You can setup an access password, we can access easier

https://forum.squarespace.com/topic/216243-how-to-setup-password-share-site-url/