After Repair service very poor

<p>I had my car fixed by proline and I was satisfied with the service. I knew exactly the status of my car and the time taken to repair it was exceptional. I was even given a guarantee on the work done. I noticed a defect on my car and I called I got no answer. I chatted to a consultant on the website and was promised that I will get a phone call from the relevant person. My car was fixed 03-Mar-2017. I have sent my initial request 17-Mar-2017. No feedback even today. My insurance even gave me a call to find out whether I was satisfied with the work done on my car. They called me today and we tried doing a conference call and we waited for almost 5 min just to be directed to a person that can help us. How does one get assistance because I have tried all means? I am very frustrated about this whole matter</p>