Designers are paid a month in arrears for their pattern sales, on the 25th of the month or the next working day. E.g. for sales you made over the month of June, you will receive payment on (or around) the 25th July. This payment is made direct to your PayPal account. You will receive an invoice for these sales, normally the day before the payment, on or around 24th of the month.
It is vitally important that you make sure both your email contact address (where invoices will be sent) and your PayPal email address (the account to which your money will go) are kept up to date in your Designers account, so that you can be paid successfully.