VODACOM DEDUCTING OUT OF DATA BUNDLES FROM MY AIRTIME WHEN I AM NOT USING THE PHONE AND HAVE NO DATA ON THE PHONE

Once again I receive a sms this morning from Vodacom to say that this month to date R20.20 has been deductedto date for out of data bundles. I have no contract with Vodacom , I am purely prepaid/ topup for airtime and data. Vodacom deducts out of data bundles from my airtime when I don't have any data on my phone. I am still waiting for Vodacom to sort out my out of data bundles for March, Vodacom deducted R37.22 for out of data bundles when I don't even have data on my phone. The deductions are done at night/early morning when I am not using the phone and it is being recharged. Vodacom themselves don't know why this happening. I am an ex Vodaphone customer from the UK and I never had any problem with them, but here Vodacom in South Africa it's a different story. Once again welcome to South Africa, Vodacom another dishonest and incompetant company.