Dishonest dealings

It's with sadness that I have to write this. I took my car to swidish Auto in Randburg Straydom Park to be fixed I collected the car it was fine but when I checked my car bettery it was changed. It is not my bettery. I mean I have serviced my car to these people. We take our cars to them out of trust believing that they are honorable up Right and noble in their dealings with clients. This is sad for me as a consumer now I need to go buy a new bettery. If this is how they do business all the best to them.