Vodacom not looking after their clients

I'm so sick of vodacom and their rude head office staff. I have requested my wifi modem already 3 months ago to be cancelled, the agent then never submitted my request as their system even states that. Still i'm paying for the modem. Upgraded my phone contract with a samsung watch, and amount went into arrears they never deducted. After numerous calls i gave them premission to deduct They deducted more than they should and my account still reflects in arrears after numerous calls again to correct the status at accounts. The call centre agents are not helping at all. What the hell happend to vodacom. This is a joke!