Have you tried a code search method. If not, try it. Refer the user manual to remote control for details. If it too do not help you, there is no way other than to buy an other remote control, which has setup codes to your device it its code list.
If you wish to buy its original remote control, you have to contact the authorized service center. If you wish to buy a universal remote control, you should know about, which brand remote control have setup code to your TV/device brand. You should first make sure about the number of digits in the codes to your device have. There are 3-digit, 4-digit, 5-digit and even 2-digit codes. You can get this detail by the code list attached to every universal remote control. The brand name of the remote control you select isn't a matter; but, its code list should have setup codes to your TV/device brand, otherwise you can't set it up with your device.
Check this link and note which brand remote control have set-up codes to your device brand, and buy that brand remote control, according to availability. For more information http://electrohelponline.blogspot.com/
Setup procedure, and setup code list to many popular remote controls are given. Pull up older posts.