Poor decision making from *********** staff

Good day,it is much regrets that I,once again have to call on Hello Peter to show other people how *********** staff is in getting things done! I had issues not less than 3 weeks ago due to upgrades and buy out of a handset and upgrade to a new package. I have no issues with that but now I was instructed to pay in another R1100,00 so that I could do another handset buyout and after liaising with Lebo at Eastgate mall she tells me that I can no longer do the upgrade as head office says my credit criteria can not be met.How then did I a few weeks ago get an upgrade???? to a Samsung S6 and why then did no one tell me before I paid the money then I would rather have used that money to pay my account? I even asked if I cannot get a cheaper phone the Samsung S5 or even the A 5 but now I have to wait another 3 months,I think this is ridiculous. Is there anyone that can help me understand why it is I cannot do the upgrade and doesn't anyone see the amount of money I spend a month with Virgin mobile? It's not like Virgin is the best it was a matter of convenience but now I am wondering if I should go ahead with the deal from Cell C?