Spice Jet Airlines — Website didn't allowed to cancel the onward journey with confirmation no:B1U4SL - Requesting for Refund for Onward fare

Dear Sir, I have booked a ticket with confirmation no:B1U4SL. Onward Journey was scheduled by 2:45 PM from MALE. I tried to change the flight /cancel the onward journey. I was not allowed to check the same when i check around 11 AM. If i could have allowed to do so, then I could have get back a part of the amount paid. But the site didnt allowed me to do so. I have called the customer care and has been put on hold for around 1 hr each and the call will automatically got disconnected. By around 3PM only I was able to connect with the representative. Due to this issue i dont want to loose my money. I need to process a refund request for the onward journey. Please do the needful.