my mistake

I've already taken my classes for 2 days in B center. When I visited to the staff's office for the first day in order to get my schedule, there was not my schedule in B center. The reason why was that I was assigned to A center. I was embrassed. I told the manager who in charge that there was something wrong with my schedule. I decided to study in B center. The manager allowed me to study in B center. After 2 days...
I realized that it was my fault yesterday. I singed up for A center where I can study sparta course in Korea. I'm ashamed of my misleading. I apologized for my mistake to the staff. He understood me and suggested to me. 'If you want to study in A center, you can go there at your conveinent. Also, once you listen to a new class there, you can choose what you want.'
I appreciated his all kindness.
I want to give him a gift before I leave here.