rushed service is bad service. highly disappointed

I bought a bike around 3pm & recieved a open box. I questioned this & was told he doesn't know why its open. I asked if all parts are there,he confirmed yes. When I got home I saw that the frame make was different to the seat &wheels. I called to check & was told to bring it back. I arrived at the store about 5:40pm and recieved the worse service ever. from management to shop assistants were rude & unprofessional. They told me to go home & do exchange the next day as the shop is closing at 6pm. I politely refused as this was my second trip to the store at my expense & inconvenience for negligence on their side. They then assembled a bike with matching parts only to find the wheel was faulty. I then wanted to do a refund as there was no more stock left. Not sure if it's true or if they just wanted to get rid of me due to it being so close to home time. The guy rushed to front desk only to find the lady had just left knowing I was still there & would need her assistance with the refund or exchange. I was rushed out of the store with the same faulty item & was told no one can help me so I must come back again. I am utterly disappointed in the service recieved.