Continuous Billing issues and worst customer service ever

This company has a non existent customer service. Why should I go through the same problem with you guys every month? My debit order bounces but the funds are available then I get charged an extra R50 for that failed debit which was not my fault. EVERY MONTH!!!!!!!!! Rather let me make my monthly payments manually myself. Response time on your WhatsApp platform is terrible, one waits 15 to 20 mins before your people respond. I know they handle multiple chats at a time, I used to do that same job for a different company but we never leave customers hanging for more than 2 minutes while chatting with 7 other people. You tell the customer that you are still with them and are still looking into the matter and move on to the next and keep doing that for everyone. Why take a chat if you are not going to engage it?