Payment Transferred But goods are not received .

We have ordered printing materials from our company to Supplier in 2023. Initially we asked quotations and against proforma through mail we paid advance . They made the product sent mail with new proforma of the finished goods . We requested Tax bills to make the further payment and we refused to pay against proforma . But they refused and adviced to pay against proforma . In 2024 again the supplier contacted us for payments. We made the payments by trusting the company director . After receiving the payment He is not responding . Now he is demanding one year interest. And rent for the goods stored in ware house . We went personally to meet the director of the company . The director of the company is saying that proforma is not legal document and He is ready to meet in court. Until unless interest is paid he won't send goods and return the money . we have just asked Quotations and there is no PO sent through mail with the sealed copy. And still we have not seen the finished materials and No gst bill is received Pls advice