Front Suspension Stabilizer Bar problems of the 2008 Ford F-150

I own a 2008 Ford f150. In the year of 2014 I began to hear a noise from the front end of the vehicle. The noise was heard when going over bumps and making turns. On August 14, 2014 the vehicle was serviced and repaired for front sway bar end links. In the year of 2016 the noise returned with the same symptoms. On April 5, 2016 the vehicle was serviced and repaired for front sway bar end links. In the same year the noise returned with the same symptoms. On September 10, 2016 the vehicle was taken in for an oil change and I informed the service advisor about the noise. His response was, �his mechanics would not be able to check the issue due to minimum staffing�. December 17, 2016 the vehicle was serviced and repaired for front sway bar end links. I was concerned about this reoccurring issue and asked the service advisor who would I need to speak with in regards to this issue. He replied �no one, just bring it back and we will replace it for free�. I really wasn't satisfied with his answer and called the customer relationship center. I informed them of my situation and was provided a follow up case number (cas11317836). I was told to speak with the service manager in regards to the issue and refunding the amount paid on August 14, 2014. There is obviously a defect in the stabilizer sway bar links and need to be addressed. Service manager indicted there will not be a refund and I will be paying for any future sway bar link service because the vehicle is not under warrantee. Ford selling and placing defective parts on vehicles and now want replace it at their expense. Is this fare?.