I broke three spider spawners and one pig and it disappeared and my monster spawners turned into a pig. I didn't understand this minigame. I was AFK and they banned me for 4 days ...
so judging from the post I shall assume and give my answer on yer case: on this case it seems you used a fortune pick or normal pick instead of silk one, it will break them like normal MC mechanics should, and regarding the spawner turning into a pig spawner, just report this to the staff team so they can check and help you out regarding this case, the only thing I can understand from this is you made an afk pool which is bannable(as far as I know I maybe wrong) you can appeal for your ban here on : https://www.guildcraft.org/support/open glhf getting sorted out, and just be patient