Poor customer service and quality of knives sold at blades and triggers

I purchased a Kershaw knife from blades and triggers whcih I had for just over a month, the knife blade releasing mechanism came apart whils laying in the side of my car door panel. I took the knife back to the shop, the sales assistance was not able to make a decision to either give me a new knife or a refund, he went on about wear and tear and can only have it looked at the following week by a repairman. I waited for 2 weeks and I got no feedback from them. I eventually called them and spoke to a number of people after finally getting hold of the area manager who evemtually called me back to tell me that they can fix the knife but I need to pay the courier costs of about R250 . I believe this is very poor customer service, after paying a lot for a knife and expecting a good quality product to fail within a month and then having to pay for a courier to have the knife fixed does not match their claim that the product they sold was good quality. The least I expected was to have the knife replaced or a full refund. I am still waiting for feedback from their manager