Data usage without my knowledge on my Vodacom account and them trying to shift the blame on me.

Got a bill for R42 000 for data usage in Zimbabwe.i have never been to Zimbabwe. My passport can prove that. The data was used over a period of 5 days. My wifi which I paid was cut off. . They came back to me Saying it is not *****. Upgrades was made over 7 years with no sim as I did sim swops on my old number. I never used the free data allocated to the contract number. I made upgrades and my account was changed to open account without my consent. I never have been to Zimbabwe. I am falsely accused of activities on my account. I had a top up account and never asked to change it to an open account. When this happen to you, dont expect any sympathy but rather that they would do Anything to put the blame on you. Vodacom will never get any business from me ever again and I will warn people as I go along.