You can repay your loan via VIALET mobile app by using the Repay section in the Limit tab.
You must make the monthly payment every 30 days, given that you have used the credit limit and have not yet repaid it in full. After an invoice is sent to you - you will have 5 days to pay it in full. You can also repay any amount between the invoices using the Other payment option in Repayment tab in the mobile app.
To repay - make sure that you have PLN balance in your VIALET account by toping up using either other bank card or Przelewy24 payment functionality.