VODACOM, BAD CUSTOMER SERVICES

So I pay Vodacom Monthly using my credit card, For the past year I have been struggling to get Vodacom to Change my email address, they refuse to change my email address and they refuse to send me my invoice via my new email. They hate change and they said that they are not going to assist me in changing my email address as I can get all the invoices online... What about the Attitude they have. Second I have been struggling to pay my account since 01 April, I have proof that Every-time I try to make the payment I get a 404 Error, So I have called them and told them that I cannot pay due to this error, They told me That it's my issue I need to make sure to pay, So How can you pay if you do not have a Bank account in SA? All I have is a Credit Card, I have been paying with a Credit Card for the past year, and They refuse to help, Because my account was only paid on the 5th due to the 404 Error, They levy a late payment on my account... I really think Vodacom is becoming the **** network of the year and because of this, I will not recommend them to anyone, I will also be closing my account, They don't need me, But I will make sure that Vodacom's name will get bad marketing form me