Extremely unhappy customer

<p>I upgraded in September at the Fourways Vodacom shop. I received a quote for 568.49 which includes the Sony Xperia XA Black on a Smart L package, 9.50 for caller identity and a 30 handset fee. When I checked my balance in the beginning of the month it was already on 868.When I phone vodacom fourways and the customer centre the one tells me to phone the other. When I upgraded I spesifically asked the consultant twice whether I will be paying for the old handset and he clearly stated that I wouldnt. It seems to me that they are now still charging me 300 for the old handset. I have spend my day phoning the store and customer care with no solution. Please help. </p>