Upgrades:
You can upgrade your hosting package at any time in your My Nativespace area (http://my.nativespace.com)
All upgrade payments are pro-rata, worked out as the difference between the old package and the new package price to the nearest day, so you only pay for exactly what you use.
To upgrade, click My Hosting Packages --> View Details (the small icon to the right of your Hosting package details) --> Upgrade/Downgrade Package and follow the instructions to complete payment.
When you complete the upgrade order, your package limits will be increased to match the new hosting package with no downtime or disruption to your sites, the upgrade is instant and seamless.
Note: If you are upgrading from a standard Hosting package (Premier, Business, Multi 25 etc..) to a Reseller package, you can find more details here:
http://my.nativespace.co.uk/knowledgebase.php?_m=knowledgebase&_a=viewarticle&kbarticleid=80&nav=0