Bad service

We've been clients for 7 years and for the first time our premium returned. We paid our premium last week before they even informed us. This morning they sent an e-mail and whatsapp that our service will be suspended due to R99 outstanding and 5 minutes later the WiFi was disconnected. The R99 is a fee they charge because the premium was unpaid, but they already received our full monthly installment plus we must pay a R150 reconnection fee. I already paid an unpaid fee with the bank, so why I need to pay them as well, I don't know. So much for a loyal customer.