don't bother appealing because i could take months to years. I'D advise u wait for next September so u don't appear desperate.
A) pay your fees in full if possible
B) make some deposit towards accommodation, could be £200/ £300
C) have a good bank statement, if it's an individual's bank statement have at least 8 million naira, if its a company at least 10 mill. statement should be for the last six months. The British are more interested in the account history rather than the current balance (they like to see a steady income)
D) your sponsor's bank has to provide a letter that he is the sole or main signatory to the account.
E) recent income tax clearance certificate
F) never state that your sponsor has too many dependants
G) for a company or business- articles of association, any receipts or invoices that'll demonstrate the company's still functioning
H) when u fill the student supplement questionnaire, you know areas where u're asked why you want to study the course and what you plan to do after studies-- make sure your answers point to the fact that you plan to return after your studies (i hope you do want to return eventually

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I) GET BORN AGAIN AND ASK GOD IN JESUS NAME AND YOU'LL RECEIVE. IF YOU ARE ALREADY BORN AGAIN JUST ASK, SOW A SEED OFFERING AND WAIT FOR YOUR VISA. it's been tried and it worked