@William129 you could try Sky's help here: https://www.sky.com/help/articles/sky-tv-no-satellite-signal-sky-plus-error-message-broken-image
The cause is most likely a fault with your dish or cables. Unfortunately Sky no longer provide engineer support for Sky+ equipment unless you have Sky Protect, so you'll need to contact a local satellite engineer to take a look.
Alternatively now might be a good time to consider upgrading to Sky Q, as mentioned in the help guide. Any dish or cabling issues will be addressed as part of the Sky Q installation at no additional cost to you.
