Complaint Vodacom

I have 3 Vodacom accounts, I regularly go overseas and use the Roamon facility to prevent any unnecessary data and airtime expenditures. I returned from a trip and I have been billed for data, I reported this to Vodacom in March 2019. I showed proof that I connected Roamon but only a portion of the cost was written off. I went overseas again and the same happened, here is a list of the complaints:***, ***, ***, ***, *** , ***, this is over a period of 6 months. Vodacom have soft-lock all my lines including my optic fibre Wifi line . I do not know how to solve this.