Yeah I phoned last week and it came today.
There's pages of info but basically you can appeal in relation to your tracker or for extra financial compensation. They list figures depending on the severity of your situation and how it affected you. Between 5,000 and 35,000 but your initial compensation offer will come off that figure if they decide you have a case.
They want to know how its affected you and fir supporting evidence-receipts, doctors notes, financial advice, legal advice etc.