Not trusting your customers / Poor service

I purchased my Samsung french door fridge in September 2014. I have dealt with a salesman called Sam, he did not explain to me that it would not fit through a standard doorway, once delivered, i had to call up Samsung to send technicians to open the doors so that it could fit in, i was quoted an amount of R1000, which i paid, i then phoned the store and asked to speak to a store manager, i was put through to a gentleman called Percy whom i explained the situation to, he then promised me that he could not refund me the whole amount of R1000, but he could credit me with R500, i was to come to the store to see him, which i did, he was not in,nobody could assist me.I went overseas for a month thereafter was quite busy in my business, so i decided to go to the store once more before i settle my account, spoke to a lady called Rakhee, she seemed not to believe me by saying that Percy also promised another customer a free appliance so we cant believe everyone cause Percy and Sam is no longer working for Dions, she took it up with the store manager Michael Momberg and called me the next day to say that nobody remembers, it is the principle of the matter that counts , could somebody call me