Complain

I took out a funeral cover with hollard in 2015 paying via debit order.To my suprise my account was not debited for the past 2 months.I called Hollard to find out why they not debiting my account I was told that the system rejected my details.This was not communicated to me now I must go and make double payment for the month they did not debit my account or wait for end of October to double debit my account.I feel that I wad treated unfairly because the fault was not on my side.