To sell your loan parts you must first add them to the secondary market. This can be done by going to the Portfolio view in your account and clicking the "Sell loan parts" button associated with the product you want to sell the loan parts from. These loan parts will be added to the secondary market.
As soon as Landbay has been able to sell your loan parts to new investors, the proceeds from the sale will automatically be credited to your cash balance and you will receive a notification via email.
Please note that the secondary market does not provide a guarantee that loan parts will be sold as the sale is dependent on new investments.