Zepo Technologies Pvt Ltd - Complaint for nonpayment of refund

I am a bonafide citizen and consumer of Delhi, India. I own a business by the name of GauriiandGaithh. I purchased a ZMM integration tool (used for creating online store) from Zepo Technologies Pvt. Ltd. (startup based in Mumbai and Bengaluru) in the month of September-October, **** for an amount of Rs. **,***/- through Zepo.in. After a few days only, the product/service was not showing the performance as promised at the time of purchase. I addressed my issue to the seller by writing mails and contacting them through phone but I never received a positive reply from them. I even tried to contact the seller on their social media accounts and even tried to get in touch with Mr. Nitin Purswani (founder of Zepo). In the end, I asked for a ***% refund of the money but they have not been replying ever since. Now, I would like to raise a consumer complaint against the Zepo Technologies Pvt. Ltd. for the ill-treatment and harassment I have been suffering.

Here are the complete details about the seller (Zepo Technologies Pvt. Ltd.):

Zepo Technologies Pvt. Ltd.

*) Aamchi Mumbai Address, S-*, *nd floor, Pinnacle Business Park, Mahakali Caves Road, Andheri (E), Mumbai-******

*) Namma Bengaluru, F-*, *th floor, Gem Wellington, Next to HP Petrol Pump, Near Manipal Hospital Murugeshapalaya, Old Airport Road, Bengaluru - ******

*) Contact nos.: **********, **********, **********, **********, **********

*) Email id: support@zepo.in, nitin.p@zepo.in, kapil@zepo.in, prashant@zepo.in, gayatri.g@zepo.biz, sonam@zepo.in