Bad service

My new microwave went in for repair under guarantee has been there how many times for the same problem went in November 2021 only received it back last week in worse shape than when it went in the timer resets randomly as this is a factory fault they are not able to fix it. Now it is not working at all the glass plate is not turning inside and full of scratches and not heatting any more now i wonder how many of the parts inside belongs to me