Car went in for service and ended up damaged!

My vehicle is 10 years old out of motor plan but I still insist of having it serviced at the dealership. I always book my car in for service at FREEWAY TOYOTA but this particular time booked it in at SOUTHERN TOYOTA - BIGGEST MISTAKE EVER! The fog light on the RIGHT HAND-SIDE was gone and needed replacement which I requested SOUTHERN TOYOTA to do whilst the car was there for service on Thursday 30 July 2105. On Friday 9 Oct 2015 Driving to work the engine cover and fender lining on the RIGHT-HAND side of the car comes loose s****ping on the tarmac and wheel, both are now damaged. I called SOUTHERN TOYOTA on Friday 9 Oct 2015 to inform them of the incident to-date they are still returning my call. I then called TOYOTA CUSTOMER CARE on Monday 12 Oct 2015 to log the incident. The CUSTOMER CARE and I have been contacting SOUTHERN TOYOTA daily to follow up on the incident the standard response is that \THE SERVICE MANAGER WILL CONTACT YOU"to date NO CALL received from the SERVICE MANAGER? The customer service and experience was very hostile and unfriendly from the onset. I would not recommend sending your car to SOUTHERN TOYOTA for service. FREEWAY TOYOTA provide much better service!"""