3 weeks no feedback on upgrade

I was referred to the Telkom Store in Cresta by the Clearwater store as they did not had stock. On the 16 February 2016 I went to the Cresta Store to upgrade. I was told due to my contract being longer than 2 years they need do new credit check, it will take about 24 to 72 hours- don't worry Sir we will call you as it will not take to long. Every since I have been trying to phone the store and no one answers. When I call the call centre I was informed that they only deal with walk in customers. But I was also a walk in customer and was told they will phone me. Well it is now 3 weeks past and still no feedback on my upgrade. ARE THEY STILL DOING A CREDIT CHECK?? I will contact the ICASA in a weeks time as I am not getting any assistance.,