Aseembly flaw in sandals

I bought a pair of Gladiator sandals WITH A 4" HEEL froM FOH back in Jan of 2009.   It's not like I rushed to  wear them so they sat in my closet for 5 months before I wore them  in my home for all of 15 minutes.  Three weeks later I put them on again and I noticed that one heel was wobbling and thought it was in the heel from being to skinny so I took them off looked at it and didn't see anthing.  Within about 20 minutes the entire heel came apart from the rest of the shoe.  I called FOH and they told me, "tough luck,  you only have 3 months to do a return,  period, no exceptions!!!."  

I am furious, not only because the shoes actually have an assembly flaw, according to the shoe reapt guy, but also because FOH sent me a whole  size too big. Boy do they look ugly on me!!!  I had to spend $18 to get the one shoe fixed and I had hoped FOH would then send me a replacement with reinforced assembly made with screws,  NOT staples.  It's only a matter of time beforei have to spend another $18 for the other shoe so I had hoped FOH would then take them back and send me the correct size, as well or return my money!!!  They refuse to either!!!