My name is XXXXX XXXXX I'd be happy to answer your questions today. I'm sorry to hear that this happened.
The starting point here is whether the college agreed to provide the remaining courses in any sort of agreement that was signed at the time that you purchased the original course. For example, if you had purchased all six courses, and they only gave you one, then they're in violation of your contract
and would owe you at least a partial refund.
Also, if the introductory course can transfer to a similar program at another school, then you received value for your money and a judge would not order them to provide a refund (even if the other school might be inconvenient or not a place that you might otherwise have chosen to go).
Essentially, to get a refund in court, a person has to prove that the company breached a legal agreement that was made, or that offering the first course in the series created an obligation to allow students to take the remaining courses. If they explicitly promised that they would continue to offer the entire program, and you reasonably relied upon that promise in taking the introductory course, then you may be ale to get a refund (if you cannot complete the program elsewhere). If not, this may unfortunately be one of those situations in life where there is no legal recourse.
I realize that you may be disappointed by this Answer, as it is not entirely favorable to your situation. However, it would be unfair to you and unprofessional of me were I to provide you with anything less than truthful and honest information. I hope you understand.