very bad customer experience

It is so frustrating i am a Premier client and im getting no assistance from fnb it has taken you 4 days and my query is still not resolved. YOUR AGENTS DONT KNOW WHAT THEY ARE TALKING ABOUT . Firstly they lie and say they cant follow up with the department that needs to close my credit card and now i am holding on for over 30 min . I have sent my complain on your app and still have note receaved a call. i have just been informed by your consultant that someon will call me back.....the same thing i heard on Monday. Hopefully this mail will find someone that can help.