B3 Service with a twist

I brought my car for a scheduled B3 service to Mercedes Benz Old Fort Road Durban on 12/10/2015. Upon receiving the car back that afternoon I noticed that although being charged for new wiper blades, new ones were not installed and I still had a broken one from when a stone hit the windscreen. I took the car back and it was whisked away and came back with two old ones. <br> <br> When I took the car away and tried adjusting my seat back to the position I normally drive, I found the seat no longer working. I immediately returned to the service department to report this to the service manager who told me to bring the car back the following day 13/10/15. So I did. 8 hours later and its still not working. Then I'm told that they need the car for two more days in order to sort this out??? <br> <br> In addition to this, I notice that the service book is not signed and stamped, that after the car has been with them for two full days. I took the service book back and requested for the book to be signed and stamped. After this I'm still sitting with a seat that doesn't work anymore and two old wiper blades, but my account is paid so no loss to the supplier. Call logged and hoping for a response...