Jaffes Ford purloin customers in the service department & Piteous Assistance

I sent my car for service to Jaffes Ford Worcester, as the car hasn't been serviced after a long time. The job description states: -Filter Air Cleaner -Plug Oil Drain -Filter Oil -Spark Plug -Engine Oil -Light Bulb

And they charged me for everything, which is not a problem as I am paying for the service being delivered.

Once I had a different mechanic check the car he noticed that the spark plug hasn't been changed instead they have left the old plug inside, which is cracked in 3 different places. I do not have much to say because when it comes to providing a quote on a job or producing an invoice to the customer they are world-renowned leaders, and when the time comes to deliver the service, there is a long list of what has been done. Now not every customer will be checking their motor to verify whether the invoice they paid for is what they have received.

Nou my vraag vir Jaffes Ford is, is jy slim, ń skelm of is julle ń slim skelm ?