Vodacom very bad service provider

<p>I bought two devices with Vodacom under a contract within couple of months I did a premature cancellation,I paid the full amount for the devices,wich was 15/12/2015,now I keep on getting calls from Vodacom legal department telling me I owe them,which my premature cancelation I did in vodaworld shop,they email everything to account department but now I still owes them,my credit score is bad because of them now.</p>