Refunds? Where'd you get the from? LOL
No session is wasted. A lot of the work in analyst is unconscious. It might mean a few sessions of chatting rubbish are needed whilst our inner life's sort themselves.
Thers was a case from a French T where a client spent each session in silence and at the end of a certain period he thanked the T for his help and felt he'd resolved the issue he asked with.
Who knows what or over less need to resolve themselves?
Not every session can be intense.