Uttar Pradesh State Road Transport Corporation [Upsrtc] — From last 20 days Refund not received from upsrtc

I have booked one ticket for my mother from bareilly to kanpur in 17th may for the journey of 18th june in janrath worth 613/-, later on upsrtc has cancelled the bus without any prior information and my mother had to take normal bus, enquiry office told us that amount will be refunded in 7-10 days, i have sent lot of mails to upsrtc helpline but they arent reverting, everytime they are telling that they r checking but after 20 dyas nothing happened, neither my amount refunded nor they replying on mails.. Pls help