[Dec.vs]

While trying to do a partial refund on a company I told them that the package hadnt been hindered with and that there was no more they could do. I then rang up and they said the same thing and to contact DPD and make a complaint on there.
Has anyone ever done this before? I was going to tell them that my Track suit bottoms and jacket didnt come in the parcel. Do you think this will work? And whats the best way to go about it.