You don't need to pay for services to get into dental school. Everything you need to be successful can be found on SDN and Reddit with a little bit of effort using the search functions and browsing the individual school threads.
I absolutely agree that you should not pay a third-party unaffiliated with your school to navigate the application process. If your school has a health professions office, you should consider reaching out to schedule an appointment with an advisor. They may charge a fee (as my school did) but it should be reasonable.
You don't need to pay for services to get into dental school. Everything you need to be successful can be found on SDN and Reddit with a little bit of effort using the search functions and browsing the individual school threads.