First invoice disgust

I started an Lte contract with telkom in the middle of December 2019. I received my bill which is due and of January 2020. They didn't send me a bill separately for December according to their call centre that can't do that. So because the pro rata amount for December together with the full subscription for January Is more than the amount I authorised them to debit my account for they have suspended my Lte. I have an event happening today and WiFi is a must. They said they would reconnect me in 5 hours. This is a big problem for me and I need this resolved urgently. When I called back a different agent said it will take 24-48 hours. This is going to cause so much embarrassment for me. I cannot believe they have done this. This is a error on their side and I am going to suffer for it. I'm disgusted. And all my guests at my event will now hear about telkom and this gross negligence