When a work provider posts a project on FlexiPort, only the project related details will be visible to you. To be able to view the contact information of the work provider you can "Buy a Project Lead". This will enable you to get the email and mobile number of the work provider. You can then directly establish contact with the work provider and pitch for the project.
Similarly, if you have posted a Service and a work provider raises a request for your service, you will have to buy the service lead to get the contact details of the interested work provider to establish contact.