File a complaint against a business with BBB, search for a business to file a complaint against, or find out the status of a complaint you submitted. File an Online Complaint.The Department of Consumer and Worker Protection (DCWP) will consider your complaint a tip. If you include your address, DCWP will mail you a complaint form. Send postal service file complaint via email, link, or fax. You can also download it, export it or print it out. 01. For assistance you may call (631) 853-4600 Monday through Friday, from 9am to 4 pm. Use our consumer assistance directory and sample complaint letter to file a consumer complaint. Use our consumer assistance directory and sample complaint letter to file a consumer complaint. When filing a complaint would be beneficial to those accessing the website.