'300 customers' means 300 people paid money for the service. If people are not paying money, then they are not customers. Requiring people to pay money is a good way to filter out people who are unlikely to trust your process and ultimately, if the goal is to have a business, then getting people to pay is a necessary step toward validation. Charging people is also a reality check on the product creating value. If it doesn't seem reasonable to charge for it then it might not be a good product.
If people are not completing the process, then the product might not meet the market. In that case it's not a matter of increasing conversions, it's a matter of creating a better product.
If people are not completing the process, then the product might not meet the market. In that case it's not a matter of increasing conversions, it's a matter of creating a better product.
Good luck.