Why not install the app one time from Google play store., effect a transfer and uninstall the app.
Choose transfer to your bank account, input the name and account number, the money will be transferred.
You can choose once off transfer [account details are not saved on Lazada].
You could also try through chat [that cleo thing] and then get a live rep and they will need you to send you bank details. Lazada will then transfer your money to the designated account.