What should I do if I send a text message for help and don't reply?

It depends on your relationship to ask for a reply. If you are a good friend, call him directly to ask about the situation. If it is introduced by a friend, the rest of this matter can only be asked by a friend.

People who are slow to reply may be unreliable and forget this matter, or they may just talk big and have no ability to help. In short, it is better to ask clearly, because they are asking for help. Give a reply if you can!