Vodacom says I owe them but will not give me my bill

I want to pay Vodacom what I owe but they refuse to send my bills to me. I have 2 contracts with Vodacom; contract 1 and contract 2. I pay for itemised billing for contract 1 and contract 2. Vodacom says I owe them circ. R1500 in total (for both contracts) for the month of APRIL (all payments to March is up to date) yet they refuse to send my itemised bill for contract 1 and contract 2.

Its been 4 days that I am trying to sort this out with Vodacom directly but still no solution in sight. A visit to their store and 4 calls later with their contact centre and still I don't know how Vodacom came to the combined bill of circ. R1500 which they say I owe. A contact centre agent did verbally confirm that I have been overcharged by R150 on contract 1 and that it 'should' be refunded, but they refuse to send my itemised bill for contract 1 and contract 2. I need to see both my itemised bills so that I can understand how Vodacom came to the circ. R1500 which they say I owe. Also, given that Vodacom's contact centre agent already confirmed 1 error, how can I be confident that the bill is correct without having any bill to look at?

The last correspondence I received from Vodacom was an sms saying that they can't send me my itemised bills until I pay. I am being bul**** into paying and being threatened that my account will be suspended if I don't pay but Vodacom cannot provide me evidence of the amount I need to pay. They say the total for both contracts is circ. R1500, but cannot separate it for me so that I can see the itemised bill for contract 1 and then separately see the itemised bill for contract 2 for APRIL. Remember that I am paying for itemised billing for both contracts.

What do you have to hide Vodacom? Why can't I have my itemised bill for contract 1 and contract 2 separately for APRIL? Vodacom should have sent these itemised bills before the end of April, like all other companies do.

I want to pay Vodacom what I owe. If Vodacom can give me my itemised bills for each of my contracts and my bills are correct, I will immediately pay. Vodacom, please play fairly. Please treat your customers fairly.