Internet connection issue

I have been calling the whole week regarding my internet connection issue and till today I'm having no joy. I was told twice that I will be getting a call from your It dept to fix my issue however I haven't receive any call. Yesterday I spoke to Sesethu (Team leader) and she assured me that someone will call and she will also call to check if I receive the call but nothing. Your call centre agents don't even know what they are saying or doing. This is ridiculous and I'm about to loose my job because of this useless service.