Bad Customer service

The level of arrogance is appalling from these company, I was interested in buying a car at one of their branches, I paid a holding deposit of R5000 to go view the car, I went to view and test drive the car and an invoice was raised for the balance. within 48hrs i contacted the sales person to cancel the sale however i was told i'll forfeit the R5000 I indicated that i've seen a similar vehicle at another branch. We Buy cars germiston refused and told me i can only buy at their branch. I questioned on what basis and there were no valid reasons. I am very disappointed and i want my refund back!