Poor Service

I have been struggling to get assistance from anyone at Hollard with regards to my debit order that went of on 2 of my bank accounts after changing banking details with them. Further to this the debit order for the one policy is now not going of any of my bank accounts. i called the call centre numerous times and was told to send an email. To date i have sent 3 emails from December to now...no response. i have received a delivery and read receipt and yet no one responds. I shudder to think what would happen if i needed to claim. Poor service