Hi Janet,
It is great that you and your sister are planning on studying with the Open University.
The delay may be because the system has recognised a record already on the system with details close to your own. This is a normal process and can take 4 days to clear up. It is important that we do not have duplicate records for the same person.
Alternatively, if you would prefer to speak to someone over the phone, you can call us on 0300 303 5303, Monday to Friday, 8:00-17:30.
Our full contact details can be found here - https://help.open.ac.uk/contact/