Confused experienced with Mini coopee

I bought a car last year April. One they told me that it does not have a Ballon but a buy back option. Only to find that that buy back option is a Ballon. If I knew. Than I was not going to accept the deal. Secondly the car was due for a service in Feb 2025. I did send the car for service on the 5th of this month. But even after service the car still indicate it need a service. So I don't know whether to trust the car or them as they say imassges of service will eventually dissappear in two or more weeks eventually. I drove a BMW 320 before I never had such a thing. Again I had a punch the car did not indicate. Maybe it's me who have a problem.