Vodacom **** to me

I was on Red Flexi 130 and was getting 130 minutes plus 250 voice bundle, paying R224 per month. On 24 February, a lady from Vodacom called offering me me Red Flexi 185, saying my monthly installment is gonna be reduced from R224 to R185 per month. I made her aware that I don't wanna take the offer because it comes with 250 voice bundle. She assured me that the 250 voice bundle will not fall away. Surprisingly, my invoice is now sitting at R309 per month, so, I'm worse than what I was. Either Vodacom must do what was promised or move me back to R224. I did record the call.