Indian Railways — Ticket in waiting and refund amount incomplete

Address:

492001

PNR Number: [protected]
i booked my ticket 18th march 2017, DOJ 16th April, waiting list that time 9 but after almost one month ticket not confirm. that was too disappointing indian railway service. i get mail refund amount Rs. 1125 credited back to my account. but whenever i booked i paid total Rs. 1425/- so why you deduct my Rs.300/-
first of after one month ticket not confirmed, facing many problem, because its return ticket. you get refund only 1125/. i am not satisfying. give me my complete amount.
its Rs. 1425/-