CANCELLED LINE NOW SUDDENLY UPGRADED WITHOUT CONSENT VODACOM?!?!

This is probably my 10th email in a short period of time to VODACOM.............your company wants to rip consumers off, and expect us to continue to pay ''a car's installment to you. It's ridiculous that suddenly no trace can be found for the contract that was cancelled, BUT instead your system shows that the line has been upgraded for the same as the previous contract!!!!!!!!!!!!!!!!! It's a ****** ******* to say the least....I WANT THAT LINE CANCELLED AS INSTRUCTED EARLY IN JUNE!!!!!!!!! AND YOU HAD NO CONSENT TO GO AND UPGRADE THE @#$$$ LINE!!!! I WANT THIS SORTED OUT AND THE BILLING ON THE ACCOUNT CORRECTED WITH IMMEDIATE EFFECT, I WILL NO LONGER PAY A CELLPHONE COMPANY OVER R2000 PM. YOU EXPECT SUCH A HUGE AMOUNT MONTHLY, BUT WHEN I WANTED TO UPGRADE MY OTHER LINE I WAS TOLD I DO NOT QUALIFY FOR THAT TYPE OF PHONE, BUT IT'S FINE BY YOU TO RECEIVE OVER R1200 FOR THT SPECIFIC LINE.. YOU ARE RIDICULOUSLY ******** CONSUMERS!!!!!!!!