Idp Ielts — Refund payment not received yet

Address:

Gurugram, india

Sir, due to some reason I had to get cancel my test and after this I followed the all steps and explained my test cancellation reason by attaching all required docs and shared the mail to IELTS Idp india .
After this on 20th April IELTS idp assured me to return my refund Amt with in 20 working days .. but today it’s almost past more the their committed time window and still I didn’t receive my payment back and even they are not responding..
Pls help

My detail
Harish kumar
email I’d- [protected]@gmail.com
Passport number-L5048244