Misguided by the counselor

Sir extra marks study material offers a free trial to students. A counselor had come to us and he said that though the trial is of 15 days he will give us a time of one month. He also said that he himself will come and collect the tab if not interested. We got misguided. In their regulations it's written that you need to call customer care within 15 days if you want to return the tab. Because of the counselor's misguidance we were in the impression that we can return it in a month. Still we called him after 20 days and then he denied that you have got late by 5 days now it can't be refunded. We tried to record the conversation with the counselor later... In a round about way he has accepted that he told us that he will give us extra time but not clearly. Kindly suggest if there is a way out