Poor Customer Service

I have never seen such a poor customer service; the only way to contact WebAfrica is via WhatsApp and you can wait for hours to receive a WhatsApp reply. I was invoiced incorrectly and it took them about 3 weeks to correct the invoice so that I can make the payment and now I have received an email notifying me that my Fiber service is cancelled after making the payment. I am wondering how such company still exist...