Extremely bad service

Vodacom took 10 years to change my Company name on my contract yet during these years they managed to change the address and vat number easily. I had to fill in another set of forms to complete the name change. Unware of a new account number I paid my account via EFT into the old account number. My Vodacom account was in credit and found out Vodacom had debited my account. We asked for the credit to be transferred to the new business account. I emailed all letters directly to an agent she informed me the credit will be passed within 3 to 5 working days. On 29/04/15 I have not yet received any feedback. I then got a statement from Vodashop stating I owed R2024.70. I phoned and emailed Vodacom for itemised billing for last 3 months. The response was from the agents were that I had gone overseas, I was on roaming then it changed that I had phoned an overseas number, another told me I must have pocket dialled? On 10/04/15 we launched a query and on that same day we received an email from Vodacom that they are going to charge us R22 per month for itemised billing. After my 40 minute \hold"from the agent today"