Stashfin - STASH FIN EMI not cleared even after full payment

I toll loan amount of **** . After * months they contacted me and told me to pay **** with late payment charges . i paid that amount but in the stash fin app they didn't clear my amount , then after * monts they again contacted me and asked me to pay **** more then only we'll clear your loan . They are cheating people . You can't even talk to then when you want to talk . they'll only call you with spam numbers and you can never call back . i want to destroy that company before they cheat more people.