...the church itself is a cult because it is founded on the aberrant teachings of Ellen White who is regarded as a prophet.
Faith, you're simply not being honest here. It is not necessary to take a position on any aspect of theology to define the words "church", "denomination", "sect", or "cult". As AZP has so properly pointed out, using your criteria, people who take a contrary position to yours could easily define all of Christianity as a cult on that basis.
Please desist from making up meanings for words just to serve your own biases.
[begins holding breath...]