I ordered a product and tried to return it due to ...

I ordered a product and tried to return it due to wrong sizing and was never able to get ahold of customer service. I emailed and called over the course of a week and some days to where I just simply gave up. Pretty much a lost since the product doesn't serve me any purpose, my best bet is to find a surplus store and try to sell it to recover the monetary lost that I endured. I'm definitely not going to return and I'll be sure to advise others to do the same.