Help ! got a Job offer I accepted now having issues with scheduling !

Long story short, my company offered me a job with a lot more pay. I accepted it and got the position and I clearly stated I wanted to keep my regular schedule … now comes today in training is supposed to start and it’s completely different than the schedule I used to have .. I have a meeting scheduled with HR to discuss what’s going on 🤦‍️ what can I do ??? I would like to stay with the new job and they promised me my schedule !