FNB Home Loans

Two months in a row FNB Home Loans has made errors with my Debit Order. Last month they failed to correctly calculate the correct amount and removed the mandatory Life Assurance. Having had to waste my own time trying to get hold of them to correct the issue, they then managed to remove my Debit Order for this month (which means I accumulate interest without knocking the capital off) and they've removed the Life Assurance again. What is going on FNB