Customer Service Complaint

I Vodacom consultant contacted me the end of October 2022, selling a new mobile at R249-99. I asked the guy to give me a day to think about it and he contacted me the following day. I mentioned to him that I will take the new Cellphone, BUT I do not want ANY additional charges, as I am a pensioner and doesn't want extra costs added to the R249-00. I do not get a monthly Pension, my husband is paying the funds into my bank account for the Debit Order. He promised me it will onluy be R249-00 I have sent an email last week on the 14th of October 2022 at 9:36am as the Bill shows now R279-00 after I have mentioned NO ADDITIONAL CHARGES. I also mentioned to the consultant otherwise I will leave the phone. I received a return email from Vodacom stating "Remember - This is an auto response so please don't reply. A consultant will " at 9:42 am on the 14th November 2022. It is now 21/11/2022 at 14:12pm and to date nobody contacted whatsoever or emailed me. They have sold a Mobile so what do they care?