
T3 has the SQ Gold lounge right next to the SATS lounge and only a few meters ahead the silverkris lounge.
Yes true. But that SATS lounge only serves as *A lounge for certain carriers, say UA. But even on a UA ticket you can always use the Krisflyer Gold lounge. I never had an issue.
..also, if OP was in T2 (LH) then there is no SQ Gold lounge so he might have confused the silverkris lounge with the KrisFlyer Gold lounge?
T2 has a KrisflyerGold lounge (T1 does not). But I also believe that the OP was bounced from the SilverKris lounge.