No service/assistance from MTN for simple upgrade

I am trying to do an upgrade on my secondary account which is due. First try MTN Lichtenburg mall 19 June 2015. I was told that my laptop will be ready for collection within 2 weeks. Went back to shop to find out what is happening on 10 July 2015 where I was told it is on the way. 17 July no laptop. Second try MTN Rustenburg Von Wiellich street 29 July. I was told that the laptop would be available the following day. Today 11 August still no laptop or feedback. I've been a MTN customer for more than 13 years and was very patient till now. I just want to upgrade or could somebody phone me and tell me what is going on or must I cancel all contracts and go over to competitors? I am staying on a farm 40km from Lichtenburg and 100km from Rustenburg. To drive up and down to find out what is happening is not on. Not one contact number is working. Is MTN going to assist or must I take it further? A written complaint was logged on the 13th July whereby an auto response was send that query will be answered in 5 working days. Today is the 20th working day so what now?