How do I fix formatting problems on a Constant Contact landing page?

I used a Landing Page for our recent newsletter instead of the email platform. There were so many issues with this campaign that I now don't want to use a Landing Page again, nor a CC email platform. The issues were as follows: REVISIONS made simply don't take! You keep making them again and again, to no avail. Then you have to chat back and forth with an agent-- yes it's great that there is live support--to fix the issue. Revisions included links and general formatting. TIME- so much time. Time is the least of it however. Moreover, it's the fact that out make a change, trust it and then send it out to your managers, to learn it didn't take-- i.e., psychological distress. Three support tickets, with chatting back and forth about more time wasted in making revisions that still don't take. Sometimes they do, and then they don't!