Vodacom Fibre billing

I am not in the habit of complaining about everything but I think I am now past being patient. I have been struggling to get billing details changed since October 2019. I have sent company letterheads and ID copies over and over and over, even bank statements. And still no joy. I am being told every time that it is too late to change it for this month and then next month comes and goes too and still it is deducted off the wrong account. This is my last attempt for assistance. I will be cancelling my fibre contract at the end of March 2020 should this not be resolved. Latest SR nr received SR***, one of many.