Absa vehicle finance dept poor service

I'm so frustrated with absa vehicle finance dept.. I went a d got a settlement from absa on a vehicle that's in a decease estate..the amount was paid up as per settlement letter..so I waited on the natis documents..I emailed them only to be informed there's an amount still outstanding then i checked the vehicle finance monthly statements where it shows the amount I had to settle and it shows its paid up then the following month's statement follow and it shows I still need to settle an x amount.. and on the same statement it shows a balance in advance of more then 130k.. how do I still owe u when u owe me money and u need do send me my natis documents!! Can I get a number of anyone in that department who I can speak to directly! The numbers I was giving and the names of the people are never being answered by them!