Vodacom *****s

My mother took out a contract with Vodacom. The contract was for the 2 x Samsung A13 cellphone deal. The contract number is ICA ***. Approval number is ***9. Her ID number: ***6****8. The contract was taken at the end of May 2022. The contract that was signed and agreed upon was for a total standard subscription of R299 for 36 months and insurance of R69.39, which total R368.39 a month, a once of charge of R98 was deducted at the end of May. In July, R610.68 was deducted, when my mother enquired she was told that the amount was due to the contract being on top up. Vodacom told her that they charged for R112.70 vodacom to vodacom calls being made on *** and R15.20 vodacom to other calls. The cellphone with the number in question was ****** towards the end of July. We called Vodacom on 14 August to report the matter and block the phone. The ITC reference number was sent at 14h52, the same day, ITC reference given was ***5. Today, an amount of R1334.17 was deducted. I would like to understand how this amount was calculated. I would like a detailed statement of how Vodacom came down to this huge amount because to me this seems like ****************.