Please fill out the fields below so we can help you better. Note: you must provide your domain name to get help. Domain names for issued certificates are all made public in Certificate Transparency logs (e.g. crt.sh | example.com), so withholding your domain name here does not increase secrecy, but only makes it harder for us to provide help.
Looks like you are using cPanel as your hosting management platform. I can guess from the IP PTR that you might bought it from Namecheap (or its resellers).
Then there are two questions:
How did you get the certificate at the first place?
Do you have AutoSSL (or FleetSSL cPanel) available on your cPanel login? If those are not available, do you have SSH access?
It honestly wouldn't be possible, because the website is running on cPanel (Assuming shared hosting) and the OP won't have root access, nor will cPanel allow certbot to modify its config.
Yes...you are correct as to the registrar and cpanel. I can access Cpanel, and when I try to update the certificate, it tells me that purchases are not allowed.
But, first of all, you need to have a SSH client and generate your private key (SSH key) before you follow this guide. When you pick a SSH client, just Google "$SSH_Client_Name Generate SSH public key" for a key to put into your cPanel section (Manage SSH keys)
Who are you hosting through out of curiosity? I ask because I've developed my own easy-to-use, graphical acme client specifically for cPanel users (and in particular GoDaddy cPanel users). It's in the early stages of release.