Mahindra First Choice [MFCWL] — Kit pad assy front ( related to break system ) damage only after 20000 km running

My vehicle no : ch 01 cm 2874 ( xuv 700 )
i sent my vehicle for service after 20000 km running, during insoection your service center found that kit pad assy front ( related to break system ) is gone and hence needs replacement for which they asked me to pay rs.5770.

I was shocked to notice that how can such a defect happens only after running of 20000 km . I refused yo pay that ammount but your service center was ready to change whthout payment

my complanit is that how can we afford to change such parts on payment of huge money and request your proper investigation of the issue as to why such issue has happenend