Is Yantai Zhongsheng Hui Di Audi 4S shop a regular 4S shop?

Yantai Audi Zhongsheng Hui Di 4S store is a real rogue sales. I paid a deposit of 654.38+00,000 yuan in this 4S store on August, 2065.438+08.08. After paying the deposit, I had an argument with the salesman on the phone that night. I decided not to buy a car here because of a series of after-sales problems. I went to refund the deposit early the next morning, but the 4S shop didn't refund it. Later, I contacted and communicated several times and refused to return the goods. I can sue or complain. So this matter has been delayed again and again. It has been a year, and I have complained in various ways, but it has no effect. Please help me find a way to get my 10000 deposit back.