If you don't have enough funds in your wallet 0.432 ETH till 21. May, why not send amount which you have and show the goodwill that you want to pay the loan back?
I guess @shasan wouldn't blame you if you started paying your debt.
You can't change someone's intention if the guy don't show any interests from his side. Something simillar happened here and bad luck for the lending service provider this time. Cryptovzla came to online yesterday but didn't feel it necessary to give any explanation about his debt. I think he already got enough dates to pay the amount but failed to pay back.