Hi Umair,
At first I advise you to enable Apache URL rewrite and the related options in Joomla configuration.
You must create a Joomla menu link on your SEBLOD search to have a nice URL.
After that of course when the user will do a search, you will see the parameter in the URL.
You can hide the search form if you wish on the options of the SEBLOD list Joomla menu link (it becomes a list).
If you don't want to see specific fields of the search form you can hidden it in your search type or hide them from the menu link.
Regards.