Never got toll in the mail (NY)

Driving home from Maine on June 27th (about one and a half months ago), I passed (briefly) through New York City, and entered Manhattan by the Henry Hudson Bridge. Signs indicated that I would have my license plate photographed and receive a toll bill for $5.50 in the mail. The bill never arrived. Will there be a consequence to not paying the toll if I ever drive through New York again? Is there a way to deal with this online?

EDIT: My car is leased, and the bill went to the leasing company - this possibility (or that it would be relevant at all) did not occur to me because I assumed it would be sent based on the name of the registration rather than the name of the actual owner. I was able to pay the toll by calling in to the number given in the answer.

EDIT2: I eventually received a bill anyway, in October. I could not log in on the tolls by mail website, so I assumed it had cleared itself up. I lost track of the second bill in holiday season chaos, and eventually had to call by phone again to resolve the issue. Fortunately, I had kept the confirmation number from my original payment, but to anyone else in this situation I would recommend not attempting as I did to pay over the phone without having received a bill - you will be billed eventually.