Not my Data Usage! Vodacom Power Play!

On my Vodacom number I spent quite a lot of money this month buying extra data bundles. But nothing could prepare me for my bill. The thing is someone must have used my phone to stream stuff or my phone updated stuff without my knowledge. My bill that night almost R4000. My total bill is around R7000. I asked Vodacom to look into it. Opened a case to investigate the usage. Case #:S3-88N2J-J3TTX. Vodacom (Michael) came back saying all connections were unique and I must pay the bill. This feels like Mal Practise and abuse of power. Firstly I was not aware of that data usage. Secondly I just don't have the money to pay that. I am a loyal R3000 a month customer so after going through the call centre and being screamed at by an incoherent operator on ***, which is supposedly there to assist with payments they came back and said they can't help me... What? How can you not assist with a payment plan. This came from Chanton Fass. Not that I would pay for this data anyway. Vodacom I am asking nicely. I did not spend that data and you are completely giving me the finger. I will have to go to Cell C. Your loyal R3000 a month customer.