Last week I ordered a part and paid for overnight ...

Last week I ordered a part and paid for overnight shipping. 4 days later I have not received the part. There is no way to contact the company. Their "returns and problems" will not allow me to file a complaint because the part is still listed as "shipping". Earlier in the year I ordered disk brake rebuild kits for my truck. They took 8 weeks to arrive. Do NOT deal with this company if you need a part in a timely manner.