Vodacom makes me sick

I need to change my bank details for my monthly debit orders. I tried calling customer care twice, it tells me to use the Tobi chatbot and the call cuts off thereafter. The Tobi chatbot is utterly useless and cannot help me. I then try to get assistance through Vodacoms Facebook page, and there too they cannot help me, and gave me instructions that does not work on the Vodapay app. I have been spending my entire Monday night after a long day at work trying to get this done. There is no email address on Vodacoms website. This company makes me sick. I want someone from Executive management to contact me via email. Do not phone me, correspond with me by email.