Never trust insurance's

I have an extended warranty with mutual and federal insurance under Game . Bought a stove 2017 so decided to insure then last year my oven element is not working tried to call them around October they sent me a technician with the wrong size of element. To my surprise that technician was sent by them but today they are asking me but he is their technician. Until now my stove is not fixed they are telling me to go back to the store. The store is sending me back to the insurance so I don't know what to do anymore. I took the insurance thinking that if my stove has a problem,it would be fixed without any hussels. At the moment I'm a frustrated customer , with a problem that will never be fixed.