Vodacom *****s from they clients

Hi my name is sumaya Karrim I have had endless problems with vodacom and not once I have ever received any help from them I have called in on the 2rd of August 2020 to put one of my numbers back to perpaid as my contract has come to an end they gave me a Ref no all n well was doen now comes the 1st of September 2020 I received airtime from them which I was not supposed as my contract is doen now when I called them yesterday to find out the noluthando said she will speak to her manager then she came back to me while I was holding on and she said her manager has said I Wil not be billed for it but this morning I see I am billed for it already and I have another number which also contract is up and I want the number to go to perpaid and they told me I can as it was upgraded so I ask how because I never ever called in to upgrade this is the second time something like this is happening and I have had no luck with anyone helping me from vodacom thye are the worst network ever I would never recommend them to anyone if I can have someone assist me with ombudsman details I would appreciate it I would like to take vodacom up