No refund paid for a return

These people will bully you with your own money...I returned a desk which came with incomplete parts. They only fetched the desk after 3 months and 2 weeks to be exact,then the next day they sent me a credit invoice and it's now 3 weeks without my refund, when I email them regarding my refund, they don't even respond, I'm not sure if one must wait for another 4 or 6 months to be refunded...these people owe me and they are clearly not prepared to refund me...