nCrowd.com aka: Spreebird.com;this week, aka: Boomstreet.com! Bad products, no cash return policy (in reality) when told could get cash back Knoxville Internet

I am usually a calm, happy online customer.  I am a very unhappy customer of nCrowd.com - which, as I'm readying to file this, just changed it's name to Boomstreet.com - coincidence, that I'd threatened to expose them online as of 10/1/15???

I was very pleased with the prior website, spreebird.com , due to some good deals and it contributed to local outlets for charity that were benefiting by my online purchasing.  However, when nCrowd.com took over (and I dare say Boomstreet will be the same way!), there was a diminished value in the products offered.  I had one decent purchase, and had 3 bad purchases.  Each time, I returned the item, they gave me 'online credit.' 

After the 3rd purchase that was dissatisfactory, I tried to get my money back (only $10, but still!).  I wrote to their email help@ncrowd folks, and got "Sam" who reassured me, due to my dissatisfaction, I could get a check issued to cover the $10, if I "filled out the attached form" and submitted it with the product return within 14 days.  I sent it and tracked it, in June, and they got it promptly. I then waited.  After 3 weeks with no return of my money, I started asking "Sam" about it; and suddenly Sam no longer responded to my emails.  After accelerating my anger, "Sam" reappeared and stated that I couldn't get my cash back because "I had already accepted store credit, and this was paid with store credit!!"  That made my blood boil....so here I am complaining and knowing that they are 'changing names' to avoid their responsibilities to those who are owed money.  What recourse does one have, when they charge your credit card for the purchase, but then many months later, when I've made a 'store credit' purchase, they won't return the $ prepaid?

I think they are a 'shell game' that takes our money and then offers substandard products to 'buy' with our store credit, since they will never return our hard-earned cash!  Don't buy from them...the products are so bad - I bought their 'travel electric toothbrush' and it looked like it was a 'child's toy.'  I put in a fresh battery, and nothing happened and it was so flimsy - it would have been suitable for a child 'playing house!'  That was the last item and it was what prompted this tirade!  Thanks for listening!