Couple of questions on sheetmetal/bodywork

I have not bought anything from amd that fit.A friend of mine put on 2 quarters on a 70 duster
and there was a 1/2 gap between the top of door and where the top of quarter meets.I also put a full quarter on my 70 duster same thing.Amd said well this is the first we have heard about a problem.THATS BS.They knocked of 100 dollars.We had to split it all the way down and reweld it .If they have a bunch of quarters that are bad they are not going to throw them away.They will send them to you and knock of a few dollars until they get rid of them.They send the good stuff to chip foose and grave yard cars