Absa Vehicle finance Department/ Legal

I Have vehicle finace with Absa and my car was in an accident. my insurance short paid the amount of R30 000 i stand to be corrected. i went into the branch to ask how much i need to pay now per month and they told me a R1050 pm. now i get a without a debicheck out of the blue to approve an amount R853.68 with no explanation. i call and they have been sending me from pillar to post. now i am told my account is with credit burro and no one informed me about anything happening i am under the impression that everything is fine and all along my account has been moved from department to the next due to it not being settled when i have made arrangements. i was never told of any options that i have by their VF department, i was a first time car owner, i did not know about short fall insurance. however i did not have any problem continuing paying my car instalment but their VF Department i cannot par R5600 now since most of the money has been paid. i said fine not know and not being informed if this happens my name with be messed up. i need this sorted. i already have a problem with Absa and i was trying to make sure that. all is good this time and this is what they did to me.