Vodacom ****

I have been going back and forth trying to pay Vodacom, calling them and upon entering my details it disconnects and at the store they would not accept payment but give me Vodacom number to call, now they want to times 5 the amount I have been trying to pay and they turned me away, where can I lay a charge against Vodacom because I have rights. Already they refused to pay my insured iphone with an iphone now this. I want to pay but not this ridiculous amount!