The problem is that I have sent 30000 btcz from tradesathosi to MyBTCZ and on the web it appears as a complete transaction, but the coins have not reached the wallet. I have looked at the explorer but I do not understand what he says.
The transaction is the number 494d716555b413b515ac8ea9c0aadb0ff15fd73db6886369ef094bbf921a8162
There would have to be support in the MybtcZ wallet for problems like this.
Without support money is lost.
No coin is ever lost unless you've lost your private key. A wallet is only a reader of the block chain. I don't use this wallet so I can't help, but sign up for slack and post your question there. Transaction is done, check and make sure the address is correct...
https://explorer.bitcoinz.site/tx/494d716555b413b515ac8ea9c0aadb0ff15fd73db6886369ef094bbf921a8162