I looked at the DVHost website using the link above. I could not see any mention of SSL/TLS at all. So again… what are you basing your expectation that they would take care of this for you on?
What do you have from them to suggest that as part of your plan the conversion of your sites to https is their responsibility and not yours? Not sure what you mean by “if there is something else that you are supposed to be doing then they need to let you know”. Really?
Sorry, but it’s beginning to look, to me at least, as though you have done nothing to get your sites ready for https, your clients have finally noticed and now its someone else’s fault because ‘nobody told you what you needed to do’.
I have no idea what is meant by the quoted paragraph you ended on there. What is the context for that?
The ‘newest’ site link you provided would really benefit from some work. The google analytics embedded js is generating an error which you can see in the console (for example).
I think there are a couple of forum members who offer a really nice hand-holding service, for example https://chillidoghosting.com/ maybe you could take a look at moving there and asking if they will take care of everything for you?