Wrong debit date leading to lapsing of policies

I have received nothing but bad bad service from Old Mutual and I want nothing more to do with them! This is now more tban 4 times that i complain about their flexible deduction date. My policies have lapsed more than once due to their own irresponsibly. They cannot blame me for their faulty system! I have over and over complained about their wrong debit order date. And they still continue to deduct on the date which i never ever signed for.