Bata India — regarding refund of returned naturalizer sandals with order id: 12295118

This is regarding my order no. 12295118 of naturalizer beige sandals which i bought on 22nd april 2019, they were small in size and i asked for the return of the product. I returned the sandals and asked for refund. On 3rd may they asked for my bank details which i gave to them on the same day. Today is 14th may and i am still waiting for the refund. They won't reply to the mails and when i called the customer care number i have given two reference numbers 1561305 and 1573879 since.
Now they're not picking up the phone also. I don't know how to resolve this issue. This has been my worst online shopping experience. Thinking of going to consumer court if they won't contact me in a day or two.