Refusing to Refund my Company

My company had ordered items from BMS Education but after I had received them I was not happy with them and we couriered the items back within 7 working days but they refuse to refund us. I was rudely treated by a lady whom refused to give out her name on the phone whom I then swore at. She continuously hanged up the phone when I called in to speak to Kaizer the saleman who had initially assisted me. I was then refused to speak to him because BMS is not his company and he is just a mere salesman. I then spoke to an apparent manager by the name Yaseen who blatantly told me that I will not get my refund as he had imported the items and kept complaining of how I swore at the lady on the phone and if I wanted my refund I should ask for it from Kaizer in his personal capacity as their company was not willing to refund me. I then sent an e-mail apologizing for swearing at the lady and request my refund but still was not successful and was told that I had no legal leg and can do as I please. See below the e-mail from Yaseen to myself;

Kaizer has NO AUTHORITY IN THE COMPANY! He is simply a sales person. 1) Addressing kaizer continouosly is your first mistake! Kazier is not in charge, I am and I am not bound to Kaizer or your word. It is the company's management decision, so I am not interested in what is "said between your partner and kaizer". If you have a problem, then ask Kaizer for your money, but it's going to come from his personal capacity, not a refund from mine 2) It is under our discretion to credit your company. We imported these from Taiwan for you. Your partner DID NOT indicate he needed a certain stencil, look at his quotation. I am not interested in what he said to Kaizer, because Kaizer will deny things and I am not interested in playing he said she said. You can do that on your time 3) Then, your partner swore at my lady, and goes off on a rant. He then accuses Kaizer of things without any written proof. 4) When I spoke to your partner this morning, he indicated: "he has no need for the money, it is a small amount", so why are you getting involved? Are you there to fight his battles. I wanted to solve the problem amicably, but your partner was blatant. I see NO REASON at all to reciprocate to you or your partner, no reason whatsoever. The matter is now closed. Yaseen