Lack of services by the agency can I file for consumer case

I have entrusted an investigation case to an detective agency thru email. After hearing from the agency regarding the terms of entrustment, I have deposited agreed amount to the bank account mentioned in the email. According to the terms, the agency need to provide me the details of investigation thru photo & video on daily basis for 7 days soon after the reciept of payment. But, the agency has sent irrelevant photographs on the 4th day only inspite of repeated phone calls to them. On the same day, I have requested the agency on email to terminate the agreed task if it can not be completed on the 7th day of entrustment and make a refund immediately. For this, no response is received even after lapse of 5 days. It is confirmed thru mail track that the agency has read my mail after 8 hours it was sent. I have the telephonic recordings also. What is the next course of action to get my money back.