Ruin the party

Please check out the following paragraph.

My friends and I planned to throw a party for our homeroom teacher. We wanted to give her a surprise, so we placed an order for a big birthday cake at a bakery. However, we didn’t duly receive the cake as scheduled time. It delayed about half an hour. Accidentally, it was too late for us to invite our homeroom teacher to attend the party. I felt very anxius then. Finally, we asked another teacher to help us, and we held a warm party for our homeroom teacher. We sang “Happy birthday to you” to her and shared the cakes. She was touched by our sincerity. On the other hand, we blamed the bakery which almost ruined our party, so we will never order anything from it.