How much is the parking space in Tai 'an Apple Garden Community?

I am the owner of the apple orchard community. On June 28th, 20 18, the residential property and a real estate agent posted notices everywhere at the entrance, elevator entrance and stairs of the residential area, saying that parking spaces were sold at a big discount on a first-come-first-served basis. When I saw the notice, I went to the property to inquire and saw many people waiting in line to pay. At that time, it was stipulated that the top 20 was 68,000 and the back 70,000. I paid a deposit of 8000 yuan that day and gave me the data. The stamp on the receipt is Taian Youtenant Real Estate Marketing Planning Co., Ltd. ... Then I will take out the money I saved before and wait for the balance. As a result, on July 3, I received a phone call saying that the parking space in the community was not sold and asked me to refund my money. Repeated negotiations failed, and now I am looking for property and developers, and they don't admit it. This excellent tenant real estate planning company also refuses to accept the account, that is, it calls every day to refund for various reasons, and then wants to buy 88,000. In the past, my car could enter and leave the community normally, but now my car can't enter the community. This excellent tenant real estate company has pushed the responsibility to the developer. On the same day, the community sold 43 parking spaces. I want to ask if this is fraud? Who will safeguard the legitimate rights and interests of the owners?