Joining a company, saying that there is also salary during the training period. I trained for three days, and then I was given a different job than I was in the interview, so I left my job?

You can call for advice. It stands to reason that you have signed a labor contract, so you should be halfway through the entry formalities. Now that you have entered the company, whether the company has trained you or not, you are already a full-time employee of the company, and you should get three days' salary after three days' work.