Reapplying after visa refusal due to more spending money.

[Fannie]

I have been refused a UK visit visa which says that I earn 1072 pounds per month, I spend 300 on personal expenses and I want to spend 2500 on my ten day trip this it's three times my monthly income


My situation :
I have over 11500 pounds in savings
Flight is about 1250 pounds from here to UK
So I just have 1250 GDP to spend on the trip that I plan to use from my savings as its my dream to visit UK.
I know have the 2500 from my savings ready to use and I am okay with that
I submitted my bank statements
How can I prove that I can afford this?
How should I go about my application
Thanks in advance
PS: I tried to upload the letter to no avail.
Thanks for your help