Very poor and robing situation

I claimed a phone from jet mart Loch logan for insurance claim last year (2017 Dec ) I got my phone on June 2018 a month later my phone was having a problem with micro phone I did sent phone back to the Jet they sent it back to the insurance peoples and insurance called the to hear what happened I explained and the insurance told me that is not their department must be sent to warranty department a month later i got a call from Jet Mart from Ziswe told me dat the warranty found that my phone has liquid damage dat might comes from the body accoding to my understanding it might be sweat i spkoe to the manger Miss Lendiwe also told me that there os nothing they can do to help me were by ever nw i am paying for the phone dat i dint use for more than 7 months this is not acceptable really