Holster losing quality and service

my Hoslter's totally broke after six months - I only wore them 3 times, didn't even take them with on holiday. but the worst part - when I mailed them, I got a reply from a Bianca: "I am so sorry to hear that. We will do some further investigation into our quality and hopefully find a solution. Thank you for letting us know. " Are we as customers now part of your investigation and solution to deliver quality for the amount of money you charge - ??? this is ridiculous. Then I will send them an invoice for my time and opinion and being part of a trial???