My sent for Service cameback with Fault

I sent my Renault Sandero 1.6, 2011 model to Renault Dealer in Germiston for service on the 11th March 2015. It was for major service (i.e. replacing of Cam belt as well major service). I got back my car on the 12/03/2015 at about 18:00. I drove my car from that day the 12th and 13th, I realised that there is something wrong it didn't feel like a car that has been serviced. I opened up the bonnet I found that there is oil spilled by engine close to the fanbelt, also realised that there is oil leaking. I called the service manager who told me to bring back the car. I brought the car back, they looked it and they told me there is nothing wrong with car, that the oil wasn't clean when they changed the oil filter. I took the car and on Saturday the 28th/03/2015 I was driving to Soweto using n12,along the way I started hearing a funny sound like a flat tire. I stop and check only to find that it was the fanbelt tearing, pieces hitting the bonet, I called the service manager who suggested I should get the car to him (Germiston dealer where it was servced),now there some resultant problem which needs to be fixed and Im stranded, I am supposed to be going home for Easter holiday. plz help