use of lounge area

I booked my ticket online and indicated that I would like to use the lounge facilities.on arrival at or tambo bidvest lounge I was told I need a code that mango was supposed to email me.when I contacted mango call centre they could not assist me I must phone Monday. My flight was then also delayed another 1:45 . I had to sit for 3 hours in the airport because mango airlines could not send a simple e-mail.I'm very disappointed in the service.A very bad flight experience. I would rather pay a bit more for propped service.