UNPROFESSIONAL TREATMENT - THEY STOLE MY AERIAL

MY CAR WENT IN FOR REPAIRS IN NOVEMBER 2017, WHEN I RECEIVED IT BACK THE AERIAL OF MY CAR WAS MISSING. I REPORTED THIS AND WAS PUSHED FROM PILLAR TO POST ON WHAT REALLY HAPPENED, THEY GAVE ME THE CAR WITHOUT AN AERIAL AND NOTED DOWN THAT IT WILL BE REPLACED, TILL THIS DAY I HAVE NOT RECEIVED ANY CALL . THEY STOLE FROM ME!!