To comply with GDPR we will not store any personally identifiable information from you. Therefore we will serve sub-optimal experience where some features such as Login/Signup are disabled. However, you will be able to search and see all the properties, see agent contact details and contact them offline on your own.
It's not possible as your OA will be holding onto your cash proceed, after your co-owner have taken their share. To sell your unit, your OA should also be informed and acknowledge in reference to your sales.