You will need to have an EOS wallet in order to get future airdrops, it can be bought with this service: https://www.zeos.co
The 13 airdrops has already happened, so you only got them if you owned the EOS at the moment of the specific snapshot and if the exchange you hold them on support that particular airdrop. It is recommended that you hold your EOS on a private wallet.
You will need to have an EOS wallet in order to get future airdrops, it can be bought with this service: https://www.zeos.co
The 13 airdrops has already happened, so you only got them if you owned the EOS at the moment of the specific snapshot and if the exchange you hold them on support that particular airdrop. It is recommended that you hold your EOS on a private wallet.