International Business

Dear Sir,
I have placed a order to buy some chemical to a Hong Kong based company.After negotiating the deal,they send us the P.I. & i have done the T/T according to that.But after receiving the T/T ,the company refused me to send the material at agreed price and ask me to increase the price abnormally high which i refused to accept.

Now,the company is neither agreeing to send us the goods nor is it ready to refund me the amount paid by me.

Kindly let me know what i can do in this matter?? How can i either force the company to deliver me the material or refund me the amount paid by me.

Thanks & regards

Sunil