Greenlight policy Contract ***6

In August I contacted old mutual to debit my account since they havent done it end of July and I was told I have three months arrears so I told them to debit immediately and I was told they can only do it on the 15th of August and I authorised them to do so. And they still didnt and I contacted them on the 17th to find out why. Then endo f August I received an email that my policy has lapsed and I contacted them to find out why because the fault was not from my side. They sent a communication that my policy was revived provided i pay arrears of R2072 and i asked why and they send me a breakdown that was so confusing to read because I was supposed to pay R392 X 3 and then twoo weeks later I received another communication that my arrears amount to R3707 still without a proper breakdown. In the beginning of the year they decided to reduce my policy premium from R571 to R392 without commnunicating with me. So now they want to make it my problem, kindly assist.