Why wouldn't they want a customer?

I went to a tutoring center for a language class I was interested in on Wednesday. They were very welcoming and nice, their yelp reviews are excellent, and I signed a piece of paper with my email on it and everything.
They told me they'd email me back to let me know when I should come (the class would be Friday or Saturday, and it's Saturday morning)

I emailed them yesterday, thinking maybe they made a typo when writing my email address. I haven't gotten a response. And yes, I have checked my spam.

I wanted to take my parent to go see them today to talk about classes and prices (because obviously email isn't working out too great), but I don't want to come off as pushy or bitchy. Should I do that? What if for some reason they don't want me to come?

I really need to take those classes, and there are barely any other tutoring centers that offer this language that are close to my house.

Thanks!

Don't worry about being pushy. If you need this class, keep calling until you get enrolled. Then go in person.