Vodacom lack of service

So I upgraded on a contract with vodacom, 10 months later I have not yet received the device. i stopped payment due to delay in delivery. I was handed over to a collocetion company I explai ed the situation to them and they still required payments. I made a payment only to fine that they already delted the sim card and gave the number to someone else. The payment is still required from myself to settle the total amount although I dont have the device or the sim card anymore. I WILL NEVER SUPPORT VODACOM AGAIN.