Damage to Rado, Owner refuse to pay.

My husband and I went to Shemer in Bedford Centre to have the battery on my Rado watch replaced. We asked if they can replace the battery and they said yes. They didn't want to give us a proof that we handed the watch in for a battery replacement, so we asked somebody else to help. Upon collecting my watch, the crystal glass was very dirty, the glass was chipped and the casing was scratch. When the owner came, Mr Alan Carrington, I told him that I am not very happy. It looks if someone had lunch on my watch etc. He was furious and chased us out of his shop. We refused to go. I wanted to talk about the damage. He put a magnifying glass on the desk and ask me to look at the scratches. Obvious you cant see the scratches without a magnifying glass and I refused to look through the magnifying class. As the chip on the crystal glass and scratches on the casing were very clear and I could see that without even wearing my glasses. Then suddenly he accused me of screaming on him and chased us out of his shop again. [Of course that was not true] Attack is a good weapon. I made an appointment and went back to see him again. The whole story of the scratches on the glass was again the point of discussion. He told me to leave his shop. I refused. On the net I showed him that it is very difficult to chip crystal glass and why would I damage my own watch. And he totally agreed to that. So there was no commitment to fix the watch, I remain seated. He came out of his office and asked me what do I want from him and I said he must please pay for the damage that happened in his shop. He said you can go to a lawyer, advocate or whoever, he shall not pay. Then he said he will send the watch to Rado in Sandton to get an estimate of the damage. And of course I didnt trust him, I took my watch to Sandton. The first quote was +_ R15 000.00. I asked the people at Rado to only quote on the damage, without any cleaning. That quote tallys to R11 500.00 He still refuses. I am a pensioner. That last amount is more than half my pension, and of course I can't afford that. Can you please assist?