Hi, i am trying to replace a 1 way 2 gang light switch, the switch i bought is a 2way 1gang stainless one, (i could'nt find a 1way 1gang switch to match the rest of the sockets so i thought i would be able to use a 2 way) . I discarded cable to the redundant light and also the cable to the switch, however, the new switch has three terminals, i wired red to top and black to one of the bottom terminals but the switch in the 'off' position turns the light on and vice versa. would i have to alter the wiring in the junction box in the loft or can i just fit the switch upside down.