pay back the money

<p>have been billed for two devices instead of one since i opened a contract at telkom mobile which was in january. The beginning of last month i logged a case and was told to wait for 21 days for it to be resolved so i waited. I received an sms at the end of last month saying my case has been resolved but was still billed for a device i dont have in my possession so i called the centre again to find out what was happening and all they could tell me was that my case has been handed to someone else and that i'd have to wait another 21 day for it to be resol ed. My question is why do i have to wait to get my money back when it was their mistake in the 1st place</p>