App**** for 1TB instead your system provides me with 400GB, want to cancel this thing

I had a contract with vodacom of which everything was fine till now recently a week ago when i tried to upgrade my existing simcard to 1 of the deals they had of which was 1TB data for R400 and pay up the old contract so that i be left with only 1 contract to pay. To my surprise when i call to request a settlement quote for the old contract and enquire about the new sim deal i was surprised when the agent informed me that it's not a 1TB sim deal but only 400GB deal, i informed her that that's not what i app**** for online and they must cancel that order and also give me a settlement quote to pay up the old contract, to my very disappointment i was told they cannot provide me with balance owing as the new order is blocking them from seeing what i owe, then again to my surprise today they loaded the data i told them i don't want on my exisiting sim card. VODACOM CAN YOU PLEASE REVERSE THE DATA YOU LOADED ON MY SINCARD AND PROVIDE ME WITH A SETTLEMENT QUOTE SO I CAN PAY THIS CONTRACT AND CLOSE AND END TIES WITH YOU. I will not pay for the data loaded on my sim as i won't use and did not budget for this. Please contact me back urgently i want to settle this account today.