stop using public relays or relays that do not block them. 

You can also use Web of Trust relays, like 

wss://wot.girino.org (my WoT)
wss://wot.nostr.party
wss://nostrelites.org
wss://wot.utxo.one

or have your own WoT relay if you have enough linux/development experience ( https://github.com/bitvora/wot-relay ), made by nostr:npub1utx00neqgqln72j22kej3ux7803c2k986henvvha4thuwfkper4s7r50e8