How to update invoice after validate and paid

is there any module for update invoice after validate and fully paid it

Ex.

i create invoice 001 on 11 of june

after some time client give replay and told about change the invoice amount 

like product price 5500 to 5000 on 20 of june

so at that time what can i do 

customer don't want another invoice number

they only accept same invoice with new amount