Upgrade Nightmares AGAIN!!!!!

I went in to enquire about upgrading my contract on Tuesday at the Vodacom store in Eastrand Mall. Got great service from the assistant although she said she would call me by Friday and never got that call. We tried to load the upgrade but was unable to upgrade due to a portfolio issue on there system so I needed to supply 3 months bank statements which I did in store on the same day. In the interim I had spoken to a few people in there call center where I was told a team leader would contact me on two different occasions.... Still waiting for those call. This morning I called in too the Greenstone Vodacom shop and a lady assisted me only to tell me that they cant upgrade my contract due to an external account issue and if I wanted to upgrade they could up grade me to a prepaid deal and with a cash payment for the handset of some R5000 +. I have been a loyal Vodacom customer for many years and before Vodacom I was with Nashua but on the same Vodacom cell number. I spend a lot of money with Vodacom as this line is used for business and a second line for WIFI also a Vodacom line. I have never been late on payments or missed a payment. I find this poor service appalling and unacceptable. I would like this matter seen too as soon as possible and resolved even quicker.