For getting test TON coins use the following:

• Testnet

1. @testgiver_ton_bot if you need a small amount of test TON coins. You can get via this bot 2 TON coins every 60 minutes.
2. If you have a task that requires a much bigger amount of test TON coins, you can ask for help from the Telegram community(https://t.me/tondev_eng or https://t.me/tondev) with a description of the reason why you need more than 2 TON coins.

• Sandbox

1. To get test TON coins for sandbox test environment, you should use @sandbox_faucet_bot. It allows getting 100 test TON coins every 60 minutes.

https://ton.app/utilities/faucet

The CryptoBot test-net is works properly for me:

https://t.me/testgiver_ton_bot