@ Bonar Pardamean Sinaga:
As far as I know, there is no limit to how many times you can open a demo account after a margin call. However, only one demo account can be opened per identity. Nevertheless, it is possible that some brokers limit the frequency of opening demo accounts. In this case, you might try opening a demo account with a different identity.
Answer to Bonar Pardamean Sinaga: Basically, brokers don't dislike newbies trading on demo accounts for too long. 25 demo accounts is actually a lot.
Perhaps the broker's consideration is in terms of server capacity, so as not to be excessive, the demo accounts are limited.
For next time, I suggest creating a demo (paper trading) account on Tradingview. The way to open an account is simple and if the balance runs out, just enter the deposit you want and it will immediately go into the account.
This way, even if you go bankrupt 100 times, you can still trade on that account.