Medplus India — Returned the damaged product but still not get the refund

Address:

Medplus, Trikon Park, Santoshpur, Kol - 75

My registered mobile number is [protected]. I had order a rice cooker and got damaged product. After a long duration as the backend team can not arrange a new cooker I was instructed to return the product to the nearest medplus store and I will get the refund. And they took my account details also. But after returning the product now the back end team is not picking my call. And they are blocking my number. Back end team number is [protected]. When I am calling to the customer care they are telling me oir backend team is working on it. It's been 3, 4 months I am not getting my refund. Please help me.