Hi Betty!
No problem about amending the contract. What you offer is ok but as if it a contract, we should specify the amounts, the 20% and 'the rest'. Is your intention to pay the money equivalent to the 97% of the goods we did not receive? In order to detail the amounts.
Something else, what would be the deadline? Because it can be in 3 years to say an example, what if the bank doesn't agree to give the loan?
Can I ask you something else? What did the enterprise say about the defraud? Do they assume the responsibility?
Thanks for your help!