Frustrated and wrongfully accused

I had an Absa personal loan and I had settled it last year 2023 March , I then received a call from these lawyers stating that Absa has handed me over because I am in arrears even though that is not the case. I called Absa to aske for a settlement letter and I emailed it to the lawyers. They have never stopped calling me and sending me emails ,they even torment me at work . I am sick and tired of these lawyers because they are not giving me rest