Bad service

I went to purchase a phone on the 21st of July for my partner so that he can use it for work, the client consultant that assisted me didn't disclose everything regarding the returning of the phone and process when you return it. The problem the app that my partner use for work is not supported by the device, so we returned the phone on the 22nd of July to vodacom store at the Glen shopping center where we purchased the phone and the lady was not helpful, the manager was worse. They told us that when you return the phone you don't get refunded same day they have to take the phone to the warehouse so that it can be checked 1st and if it's approved or not so I told the manager that the consultant didn't disclose that she only said i have only 7 days to return the phone if it gives me any problems, the process of returning it she didn't state then the manager said so why did I sign and he was also defending the consultant and the consultant was buzy shouting in front of other colleagues and customers and the manager said nothing