East to deal with.. Car in good condition

Like: Good condition on the car
Dislike: They had no idea how to install the carseat even we already paid rm120 for that carseat service. We end up putting it on ourself bcoz they took too long and no idea where to start in order to install the carseat.. We install the carseat ourself and untill we sweat.. Should we get back some of our money?