DSV chicken out

So almost a year and a half ago one of DSV's sub-contractors damaged my vehicle ( broke my left mirror). I contacted DSV who informed me that I should contact the sub-contractor directly to resolve this matter. I did so and to today the sub-contractor has not resolved the issue.

Dear DSV, This is your sub-contractor with your logo on their vehicle therefore I suggest you sort out my car and then you can sort it out with your sub-contractor. He is representing your company and therefore your responsibility.

I therefore demand you replace my left mirror that was broken.... and still is.