Refusal to investigate debits and rectify account

I signed a debit order with Chubb. Their system some times skips a month and other times goes off of my account 6 times within a month. This resulted in our account being in arrears. However the amounts on my bank accounts does not match my chubb acount statement. I have cacelled my account due to this behaviour, but I am unable to settle the outstanding amount, because I am blatantly being ignored by Bianca van Wyk and Lindo Magubane. I have mailed them numerous times to investigate my account and rectify my balance. The last responce I received was 31 March, it is now 17th of May. <br> <br> The is firstly unacceptable from a service point of view. <br> Secondly how many other accounts are incorrect. This is theft.