Horrible service

I took up a fibre package with Vodacom, the agent I spoke to took my details (name, surname, cell number and email address, amongst other things). He then sent me an invoice and a payment link via email. The invoice reflected my name misspelt, I made payment and called to request them to resend an invoice that had the correct spelling of my name. The agent I spoke to then told me she needs to refer the query to the billing department. I called them again a few days later to follow up, nothing had been done. On the 30th of July, I received an email requesting me to send a formal letter requesting a name change and a certified copy of my ID. I called fuming as this was not my error, my email address has my full name and that was captured correctly so I don't understand how I must now be inconvenienced by going to the trouble of getting my ID copy certified when the it was their mistake to begin with. I called again on the 3rd of Aug to follow up, it was still not resolved. On the 4th, i received an email saying my query has been "resolved" yet I still have not received my corrected invoice...which I urgently need to use.