Bad service

I am fuming, upgraded with MTN direct 01 Aug done by Nombuso, told me delivery will take 5-7 working days. after those days without any delivery I called and was advised that they are having system challenges. since then I have been sent from pillar to post having spoken to a lot of different people. 18 Aug I was advised that the device was invoiced on the 11th and delivery would be the following week. I called the 21st to check if all is well the courier company says there is nothing. I then called MTN direct 21 Aug at 08:26 spoke to Nomthandazo who said she will get Nomfundo to email me, still no email. I then decided to call and ask for a supervisor or manager who I was transferred to by the name of Kim Basson, she also promised to call me before 14:00 pm on the 21st Aug, I am still waiting for that call. I decided to call Kim back at 14:55 she got a Slindile to speak to me and Slindile told me that the device was with the courier. fast forward 22 Aug I called the courier at 14:06 they advised that there is nothing with them. I called MTN direct again at and was advised that KIm and Slindile are based in Durban, I will have to hang up and call again hopefully I will land up in Durban ( big ****** laugh). I finally got to Slindile at 14:29 after having held on since 14:10 ( not once has MTN called me ). Slindile says that Kim is on Lunch and Kim's manager isn't on the floor and she didn't say that the device is with the courier but that the invoice was raised. this invoice was raised the 11th Aug, it is the 22nd and no one can tell me where the device is or even do a follow up and call me, I feel like no one cares and that it's not their problem. Slindile says that she will get Nombuso or Kim to call me back before 4pm (as I wait) MTN has given me really bad service, I complained Via twitter, Email , Telephone now I am here. I have been their client for years.