Flighthub took my money without providing anything?

Hi, I’m a broke student going to go visit my family across the country, I booked through flight hub because quick Google searches told me it was trustworthy(??) (my mistake I know)

I finalize my sale, paid the 300 some dollars for my ticket home, it got taken out of my debit account, and after everything was already taken out of my account, if I went back to the homepage and said my payment was declined/there was an error

I did not receive an email, I tried to contact customer service, but they were absolutely useless, what do I do?

I cannot miss this week at my home as it is one of the very few opportunities that I can see my elderly parents, but this is also a very large sum of money for me.

Please help