There are two types of rebates....
1) Direct from the company (in this case LITEON)
2) the retailer you bought it from.
Where did you get your LITEON product, where did you mail your rebate to ?
Welcome to the world of mail-in rebate scams! I had sent for a Maxtor $50 rebate and never received anything, it's been 2 years now....
The only mail-in rebates I take part in are the CostCo ones as they are legit ! The ones I had problems with are FutureShop.
IT usually takes 4 to 8 weeks, you should have gotten something by now.
For rebates you need to deal with your store, sometimes the store deals with a 3rd party to process rebates.