You beg for an invoice then you get this ****

I have 2 contract lines with Vodacom. 1 is for my iPhone 6 and the other for my 3G ****le and laptop (opened in Jan '16). The issue here is that since the beginning of year, Vodacom only sends me my iPhone invoice with my full account spend details. So in Feb when I received my invoice I made payment thinking that I've covered both, only to find that they don't add all amounts in one invoice, so I [made payment for the 3G card later). Now in March, I get a shock with my bill cos I know that I haven't spent that much on my phone. They say it's for the 3G card and they simply expect me to pay WITHOUT RECEIVING AN INVOICE FOR THE IT! I make payment for the phone and 3G card based on what I think I should be paying (one month bill for each). It takes 9 days for them to send me an invoice! I had to beg and shout over the phone and twitter to get it. Now they have blocked my iphone line. I can only make payment on Monday and my iphone line is up to date. I am behind on the 3G card based on their own mistakes. Once I've made payments for the month that's it. I demand thay my phone line is opened! Monday is pay day, that's when it will be sorted! I DEMAND MY INVOICES FOR BOTH MONTHLY!