legal ground
Article 678 of the Civil Code
The borrower may apply to the lender for extension before the repayment period expires; If the lender agrees, it can be extended.
Article 667
A loan contract is a contract in which the borrower borrows money from the lender, repays the loan at maturity and pays interest.
Article 67 1
If the lender fails to provide the loan according to the agreed date and amount, thus causing losses to the borrower, it shall compensate for the losses.
If the borrower fails to collect the loan according to the agreed date and amount, it shall pay interest according to the agreed date and amount.