Bad service and still no Sofa or Refund

I ordered and payed my deposit in June 2019. I had arrangement and did not pay the full 75% deposit. After the deposit the excuses began. In August we got hold af a lady working there, I do believe she my be the owner. She then told me I have to make the full payment for the deposit. I told her this is not the agreement. But if so why did they made other excuses and just didn't say so. She promised me that if a pay the rest I will receive my sofa end August. I made payment on the same day. Then the excuses started again. I warned them, because they do not answer their email, phones or whatsup. I said to them if I did not hear back from them I will post it on Facebook. So I did. They blocked me and sent me a email that they do not want to business with me any longer. And will refund me and want to charge me with loss of company income. But know he wants me to wait 21 days for my refund after I have been waiting from June and after they promised me on email I will have my sofa by end August.