Settings are always there. They are part of the system. If you did the type of reset that is to try and keep your personal stuff on the device, that can cause issues. Especially if the problem that caused the need for a reset was something fishy on the device. Say a virus or malware.
Also, if the tablet had been rooted, a typical reset (neither factory or hard reset) would work correctly. The device would have to be unrooted first.
First try turning it off and back on. This may resolve your issue. If it does not, try a "Hard Reset" (instructions below). And should that not resolve it, then you are probably going to need to take it to a tech.
NOTE: Doing this will clear 'all' the data on your tablet, so it is suggested you not choose...