I WANT MY REFUND

I am disappointed with this company. I was not happy with the product I got and I had to communicate with them via email everything was fine they took the product back but ever since they received the product they have not issued me with a refund which is so unfair it's been more than three weeks now. I have not received an update from these people as to when will I receive my money back. Why can't they communicate with me they are just quiet. I have sent many emails but still nothing from them when I call I am placed on hold this is very unnecessary. Please I want my refund!