Paid settlement amount but then also harrassing me

First i was asking to make settlement to sbi executives but they were telling me to make payment of atleast minimum due and then will proceed for settlement these was continued for 4 months ... I was getting corned from sbi executives ...I was totally fedup i asked sbi customer care for office address where i can go and meet for settlement or sbi person to come and meet me .... But everytime they told me that you will get a call from our executive then sbi executive from delhi called me for payment i ask him for settlement ... In our conversation many time he told me 'sir aapse bada bewkoof maine dekha nahi hai' .... And he called me from many numbers ..... Anyhow he took approval for my account settlement for 46000/- and i told him that while making payment will call you for confirmation the file he sent me was not openning and name of the file was 'BIN' and manytime i called him but he didnt picked the call .... So in this case i called and confirmed with sbi customercare regarding settlement is it legal or no... And sbi customercare executive told me the amount 45396.07/- i told them that settlement is approved for 46000/- but they told me that in our system it showing 45396.07/- the call recording i have already sent to nodal officer of sbi... So thatswhy i made the payment of 45500/- .. 104/- more from myside...... And after that i called sbi customercare for confirmation wheather the settlement is done or not ... They told me to wait for somedays its not upadated yet .... After this i continuosly start getting calls from sbi collection regarding payment and its too harassing.... again i called sbi customercare they asked me to make more 500/- payment otherwise settlement will be broken .. I ask them to mail me and i did the payment of 500/- but then also i am getting calls continuosly and they dodnt even do the conversation they just ask my name and cut the call......its harrassing me a lot.... How can i solve or take legal action .....