FRUSTRATED VODACOM CUSTOMER

I have been struggling with my upgrades and billing since April 2019. I am been fighting with Vodacom on numerous occasions and out of 5 items due only 3 items have been resolved and this is only due to my persistent follow ups and speaking to team leaders. The last items i am trying to resolve has been unsuccessful, numerous chats to team leaders and they will not put you through to managers, i received a message for an upgrade in the 20th month of my 24 months which have for the last 16 years being a Vodacom customer. The upgrade was successful as all previous upgrades this was concluded in March .they have now billed me for 2 devices that they did not disclose on the telephone when the upgrade was done. I have requested for a voice recording copy of the day and all i get is pushed from pillar to post and no one can help. i want my credit for the 3 months for the additional handset charged. I also enquired about the usuage of my data - since my upgrade i top up with data of R120 per week on data and i have wifi and fibre at work and at home so how can the usuage be so much when i switch my data off at home and at work. I want someone to explain what is using up all my data and recommend a different add on that will fix the excessive usuage. all they can tell me i need to close all my background apps which i have setup to only work when i am in a wifi area which includes instagram and facebook et. No one can help and i am feeling extremely frustrated with the poor service not once but since my upgrades in March, no one takes accountability and we are treated like just a number even though i have been a loyal customer for years. My details are also on an old system and i will also hold for 10 minutes because they have to access an old system and get another consultant who has access to the old system before they can even start with my query