A new SSL-certificate should be installed on a oscommerce-shop. The oscommerce-shop is fully working now.
Hoster has set up new IP on www2.
Hoster has set up clone of shop on www2 with new IP is installed.
Clone must be fully functional.
Shop must be migrated to new IP (www) and fully working.
Hoster will then issue new SSL-certificate on www.
Checkout on shop must be then configured with https.
Site-admin in English for www available. No Cpanel.
You need to have experience with installation of SSL-certificate on an oscommerce-shop.