Your transfer may be delayed if it was sent to you at the weekend or on a holiday. This might happen because most banks process the transfer only on business days. That is why you will see the funds the next day your bank is open. However, if the funds were sent on a business day, but you still do not see them within several days in your bank account, the transfer has possibly failed.
Here you can find additional resources that may help you in the process and tell you more about payment processing.
If you haven't found answers to your questions here or need any further assistance, don't hesitate to contact us.