Cellucity

I went to cellucity around Oct 2022 to do an upgrade om my cellphone, a Jade help me ,i gave him the nr that was suppose to be upgraded,and other nrs that was to be changed, and one of the number that im paying for the last 3-4 years that i cancelled and is still active i never had a sim card for this nr don't know who's number it is. but Jade did the upgrade on this nr that i don't know. then the begining of this year my cell phone account was R3000 and i must only pay +- R1000pm when i contact vodacom,the lady asked me did i do an upgrade i told her yes gave her the number and she said no their was no upgrade done on my number but upgrade was done on this unknown number,i did contact Jade and he said he did the upgrade on the wrong nr,they will sort it out, but till date it's still not changed,and im paying for something i don't have.would like to know what are they going to do about this.