Request for a refund

I sent through a list of things I wanted to them and I dealt with Angelo who sent me a quotation. The following day my carpenter went to the store and included other things and Angelo then told me the price on the previous quotation has changed, so I then requested him to send me an email with the full quotation and the final amount which he did and I then paid for everything. They delivered woods and when my carpenter came he found that something was missing from the things they delivered. When he went to the store for them to give him the missing item, they informed him I never paid for it therefore they can't give and when I called them to speak to Angelo I'm told he is on leave therefore I need to pay for the missing item since it was not included in the quotation. I need a refund for this because I was given a final quotation including the items my carpenter included. These people wants me to pay again for something that I was told is included in the quotation. This is not my issue but instead ais take from the salesman. Please kindly refund my money.