My debit orders go t...

My debit orders go through on the 4th of evert month, but old mutual as always whenever there's money in my bank account they debit, on Saturday the 30th they debited one of my policies, and I sent them an email of why the 30th and not the 4th? No answer from them till now, yesterday I sent them more than 5 emails with no answer, even tried to call still no answer being made to hold all the time, I need to know coz tomorrow is the 4th,,,are they going to debit again or what? Iam sick and tired of this company I've been complaining about the same thing I'm tired