Lost luggage

My luggage was collected by another passenger due to driver's negligence. I traveled by Greyhound bus from Durban to Johannesburg and their office at park station completed lost/damage luggage form on Sunday morning and no time frame was given to me as to when I they going ro resolve it. I was in Johannesburg for business workshop, and I didn't have any clothes to wear for the duration of time I was going to spend there so I had to buy new clothes from underwear since there was nothing in my position. I've been trying countless times to query with greyhound complain department and to my surprise no one wants to help me and number of emails I've sent and not even one reply. Staff are so rude in your call centre and unhelpful. I was inconvenienced and no one wany to take responsibility due to break of security on their side and I'm very frustrated as I've exhausted all channels to find a closure in my complain