Vodacom Make me pay double after upgrade

I am an old Nashua mobile migrated to Vodacom. I used to, when the contract is due for upgrade you dont have to the old contract anymore, you just start new one with new device.<br> <br> So i had a contract for more than 22 months now and i was due for upgrade since July. then i decided to upgrade via the phone. I was not advice that i still have to pay an old contract until it ends and never asked because am used to with Nashua mobile. Now i just check the statement is showing double hardware installment.<br> <br> This is inconvenience me badly in my budget, am sure i knew i was gonna wait until my contract ends. so is already over 14 days i cannot return the new device. am so ripped out with this company.<br> <br> I cannot afford to pay double. What do i do now. meaning am stuck. Can cell c buy me off from this ******* service provider please please. my complaints now are numbered and i regret why i considered upgrading with them. <br> <br> Someone please advice. Other providers please help. I have another contract with MTN, they don't do this. <br> <br> Still, the call centers always transfer me from one to the other.