semi lether sofas are cracking in less than a year

Hi am Jones Skosana I bought Leather sofas At the Mphumalanga branch in Bethal I went to the store earlier this month to tell them about the sofas I bought on the 23 January 2017 The leather on the sofas is cracking very bad They took all my proof of cash purchase and made copies then said they’ll get back to me but I am still waiting for they call.

What should I do