Being Overcharged on my account / Poor service on call centre

<p>My contract started in November 2014. My first instalment was 01/12/2014. The amount that i was charged for the handset was R 263.16 per month. I did my upgrade in August 2016 and i was told that i still have to pay the balance of the old handset as the 24 months werent up. I have just paid the installment for end of November (01/12/2016) and i am still paying for the old handset. I have calculated that i have now paid 25 instalments on this handset.</p> <p>I phoned the call centre at 10.08 this morning. I sat on the phone for 36 minutes and eventually had to hang up because the gentleman disappeared and didnt let me know what was happening. After hanging up he didnt call back but i got a msg asking if i was happy with the service.</p>