Precision Induction Cooktop Received partial shipment and billed for full. Cannot reach company by phone or internet. Left messages. Libertyville, Illinois

i ordered precision induction cookware the last of June.  in july i received a partial shipment.  the tracking shows the delivery complete.  i have called numerous times to this company and left a message on their answering machine and the message says they will get back to me in 48 hours.  Nothing so far.

i have tried several times through the internet, but cannot find a place to contact them. the invoice sent with the shipment shows 3 items back ordered.  I still have not received them, but have been billed $194.62 on my credit card.  I could return the package I have, but I am afraid that they consider the shipment complete and I don't know how to prove that I did not receive the merchandise.

i am going to write a letter and atttach a copy of the invoice asking why i cannot receive my order in full.