I think your ISP changes and your not receiving replies are related, but not really. Just because your smtp settings change in your mail client, doesn't mean the path of your incoming mail changes. I'm not sure what you are expecting to see as a new mailhost. The address you are submitting for mailhost setup is a rr.com address and that mailhost already exists in your account. I see the November 18 mailhost config email was sent to a different LHS address than your SC account is under, but the host is the same.
As far as not getting responses to submitted spam, it comes down to 'did the submission reach us?'. It could be a problem of your ISP blocking the submissions with their outgoing spam filters, so the submissions don't reach us, or your submissions reach us but your ISP blocks our replies.
I do see some submissions in your account from today, so at least those submissions are reaching us. If you didn't get replies then you know the problem is your ISP blocking the replies.
If the submissions are reaching us, as they are and you saw at least the one in your report history, there will be an "Unreported spam" link on the main SpamCop page. Clicking that will take you to the first submission, where you can complete the reporting process.
If the unreported spam link is not there, your submissions did not reach us.
Richard