I am not sure if he is talking about Blockchain.com or Blockchain.info
They're the same site; try entering blockchain.info, and it will redirect you to .com
Quote
You're wrong, I tried to register there, not a seed key or phrase key
Hmmmm, quite sime time since I haven't created a wallet there; but they used to give the seed.
Apart from that, they also ask the seed for wallet ID recovery, so it's kidna strange they don't give it....