Arrogant and unprofessional service

The worst experience after being with Iemas for over 15 years. I received a message from Iemas insurance that I didn't pay my insurance premium. I emailed them proof that my debit order was successful. I received a call today from an agent that should not talk to people at all. She was arrogant and kept on telling me I didn't pay my debit order even after I emailing them proof. She didn’t even bother to investigate problem at hand. After explain over and over that it’s a debit order not an EFT, she then changed her story to …. “you short paid your debit order”, how do you short pay a debit order? Only to find out after minutes of arguing that apparently someone forgot to update the debit order amount on their side. How is this possible? I demanded that a senior or manager need to call me back within an hour.. This was at 13h11, no call yet and it’s now after 5pm. You can't treat your clients like this and get away with it. It’s clear that I am just a number with Iemas Insurance.