What should i do if seller on ebay didn't send my Package?

Ok here's what happened, i won an auction Nikon Camera with 55-200mm lens, manuals, bag, usb and tripod. Seller sent me a message telling me that he only sent the body camera via UPS, but forgot to sent the rest, and he will send it next week via USPS.

So what should i do?
Should i wait for the next Package, it's so suspicious, how could you forget the lens! And plus, he said he will send it next week.

Should i file a report?
Am i still able to file a report after waiting for lets say 2-3 weeks?
Or should i just wait?

I'm worried that i'm not able to file a report on ebay after weeks like what happened before i bought a ring, and it took a month and the one that i won which is the ring is not listed there anymore because it's been awhile and i havnt leave a feedback to him. But luckily i got the ring after a month but i wasn't able to leave him a feedback or report because its not listed there anymore.

I would say that this could be the technical issue… Report it to the service to get things fixed…