Changes Not Updating On Live Website

Website I’m working on:
https://www.ssaerf.org

I’m new to WordPress but understand the very basics and am trying to learn it asap. I have one client at this time who needs me to make some very basic changes including changing the address on their website. The correct address has been entered in the ABN Settings, but it is not updating to the live website. I looked at the footer code that calls the address from the ABN settings and found this code:

<li class=”foot-address”> Address : <?php echo abn_option(‘abn_fa’);?>

I have no idea if the above code is correct, as I do not know PHP coding. I only do basic coding at this point.

Additionally, I made edits to the Donations page by simply adding a paragraph of text and then saved the changes…but again it did not update to the live website.

https://www.ssaerf.org/donation

The only plugins installed are:
Akismet, Contact Form 7, Hello Dolly, Lockdown WP Admin

Since I’m new to WordPress, the last thing I want to do is mess up their live website. I have Dreamweaver and connected via FTP and just downloaded the website locally. I do not have WAMP installed locally that I know of and am not even sure if that’s relevant info to include in this post.

So basically I’m asking for advice as to how I can fix this issue so that the website will update when changes are made in the ABN settings as well as to pages via the WordPress dashboard. Once this is fixed, I know my way around the dashboard and can do the basics and learn as I go along. However, this seems to be a pretty technical issue with which I desperately need help. This client has been trying to get these very simple edits made to his website for weeks. The original designer is not helping either. I contacted the webhost and created a ticket, so they might help if a miracle happens…no guarantee there…and it’ll take at least 12 – 24 hours which is a long time to wait considering this client needs me to also add an option on the Donations page so people can make donations via Authorize.net. They are losing donations which are extremely vital to their non-profit organization.

Any advice and help will be so greatly appreciated! I have read that some people reinstalled plugings, but I do not know how to do that and am afraid to do so and somehow mess up their live website and not be able to fix it.

Thanks in advance for assistance,

Rachelle