Worst service- Sandton City Store

I have received the worst treatment from your Sandton City store employees. After my account getting double billed in March, I went to query and I was told that i have taken a second device, something that I never did and that I need to get an affidavit to prove I haven't taken the second phone. I did that today & my phone has also been blocked, upon visiting your store with the requested affidavit, your manager at till 8 told me that I need to wait a further 14 days to sort out this issue. I do not have that time, I run a business and my phone is my only form of contact with my customers. I need this sorted now, as I have kept to my end of the contract by keeping my account paid up but am being treated like I owe you by your employees.