Made to feel as a dishonest person

On Saturday (01/05/2015) my daughter and I went for a facial treatment and we spend R1900.00 and we ended up receiving a free gift due to purchasing facial treatments. We unfortunately forgot our gift in top of their counter. I went back to collect it on the 05/05/2015 as I work a bit far from the place. I was unfortunately told that no one has seen it and they cannot give it to me and I have to drive back there another day when they have done their stock take to see If i was telling the truth. I am surprised as to why the receptionist did not bother to call me after I had left to tell me that i have left my gift there as that is part of customer service. Nevertheless I drove there using my fuel only to be treated as if I am lying, which amazes me as to why would I lie about something that is free after spending so much money. I am not sure why I received such treatment because I am a regular customer in that branch.I am truly disappointed and wondering if this how Placecol treat their customers or its that branch.