Worst customer service experience

Worst customer service ever. Ever since our accounts were moved from dashfibre to home connect, every month I get emails threatening to suspend my service due to non payment. I never miss a payment and always use the ref # they gave me, but every month it's the same story I have to send proof of payment. This month I decided to be smart n send proof of payment with the payment. Home connect still did not pick it up. I'm sick n tired of them and when you want to cancel they threaten to charge you