Flipkart — Refund not done fully

Hi Team
I paid Rs.1299 for order OD[protected], which was not shipped even after 5 days, and even after doing a lot of follow up from my end it's not shipped also even on April 15th, I cancelled the order as it's taking lot of time as it's even not shipped also on April 15th
Now they have deducted 30 rs.as a cancellation fee .
When they are unable to deliver the customer thr item and if the customer cancels how can they take 30 rs as a cancellation fee .
I want my amount 30 rs to be paid back to me.