Hmmmmm....
Dragonhorse,
I come back to an original point about professional zencart hosting...
I am in no position to comment about the merits and demerits of any particular host service, but the reality is that zencart is a sophisticated tool, built to exacting professional standards - and it requires some very specific settings on the host server to function to optimal performance.
It also requires technical competency and a commitment to domain management processes set-up that enable the zencart store owner to have proper administrative access to the server and domain.
The forum is riddled with posts by anxious zen cart enthusiasts who are experiencing problems with server-related issues, and in many cases, it's because people have been persuaded by "iffy" hosting companies, to "set up a website" at either no cost, or a cost that is so ridiculously low, that the offer can't be resisted.
Proper e-commerce has to be done professionally. If you are selling goods/services to customers, there's an obligation to do this in a manner that assures customers of operational efficiency, ethical and legal responsibility, data privacy and functional reliability.
If your goal is to establish a proper online business, to earn a living and make some profits, then you ought to consider setting up your store with a team that knows and understands its complexities.
The certified zencart hosts all charge VERY REASONABLE hosting fees, but more than that - they have the EXPERTISE to do it properly for you.
Think about this. Your current host appears to be targeting the average person who believes they need a "website" on which they can display pictures of the family, describe their last vacation, and report on how the kids are doing at school...
... and if that's all you want to do, then they are the PERFECT choice for hosting.