****med by Nissan Springs and Nissan SA

I had asked to buy a part for a vehicle and had to pay up front, before they could order the part from Nissan SA. After paying and ordering the part I was instructed that the part would be the next day. The next day came and still no part. I phoned at 16:30 and asked where is my part and the parts salesman told me it would possibly get there sfter 17:00 pm and he will let me know the following day. The following day noone had called and after 12:00 I called again just to get the message the part was still not delivered. The part was adventually delivered 4 days after the original date and in the meantime the client took his vehicle away and left me with a part paid for and because we could not finish his car on time he took his car away. I asked Nissan Springs to please refund me I was even prepared to pay a handling fee and till this day they have not refunded me but say because it was a special order they are not prepared to give me my money back and take back the part. I got a call from Goba or who ever from Nissan SA saying they are not taking the part back but I feel this is blatently *****ing from me and I would like to know what other reco**** have I got in getting my money back.