We can't always work out why some people have some problems with websites and others don't, it has a lot to do with how up to date your operating system and browser is, or what browser you're using.
Sometimes it helps just to close the browser and reload it. You might also want to try clearing your browsing history including your cookies as this often solves a lot of issues.
Don't worry if you're not technically minded and are unsure about the above; Contact Us and give us as much information as you can and our Customer Services Team will try their best to help you.
Please use the “technical issue” dropdown on the Contact Us page in order for us to look into this as soon as possible for you.