All my neighbours have access to virgin why can't I?

As the titles states , all my neighbours have virgin , there's multiple virgin media branded boxes on the front of the property and 6 or 7 virgin media branded duct covers on the pavement outside the property but yet when I input my postcode into the website my address isn't listed and I'm asked to fill out a form. Please help me I can't stand the current speeds I'm getting from sky (sub 40mbps)