Over debited my account by R10000,00

<p>I moved over from the 10 Gig plan to the 'My Gig 20 Promo' effective 1 January 2017. My bill is normally around R1500 for my phone and wifi modem. but R11500 was debited off my account at the end of January for 'Data Usage' of which I never used any more data than to what I normally use. I have made numerous calls to the call centre to top up my data at the and of January because my data had run out and then you still go and debit another R10000 off my account? We've requested that the data be capped at 20Gig. I expect a refund.</p>