Vodacom once again takes just what they want!

A representative of Vodacom phoned me saying I was due for an upgrade (Which I new). I want to keep this short with as much detail as possible. So in my phone call he said I would be able to upgrade (in which he convinced me NOT to take a handset with) in which I listened to the options available. I was paying plus minus R1050.00 there about per month. I have 2 contracts and a 3rd promotional (free) account. He told me I could upgrade all 3 my accounts but that my premium would drop to roughly R880 a month. NEVER once did he say my total cost would be over R2250 per month until my previous handset installment fee was paid in full? I can't understand why they would PUSH a sale so hard and not give you all the details! Not once was that amount EVER mentioned in my phone call and you can gladly listen to the recording! I asked the upgrades department (Terushka) the lady that I spoke to, "Do you think I would upgrade (being told I would be paying less) If I was going to pay more than a R1200 MORE???" This is madness!!! And after I launched an investigation they came back after 5 days saying my claim was invalid? Umm I think your excuse is invalid VODACOM!!! Talk about customer care... And the Maths doesn't add up aswell cause if I was paying roughly a thousand bucks and my premium would "drop"to roughly R880 how in the world would my debit order suddenly be over R2250???