Gallivant International — no membership number and not able to do booking

Address:

, 504, Varun Tower, Pant Nagar, Mumbai City, Maharashtra, 400075

I got a call to attend the seminar and was asked to decide today itself. It was 6th july 2018 and i decided to take membership for 10 years @147500 and paid through credit card and got agreement on stamp paper.
Later after 4 months went to do booking, came to know their office is closed at phoenix mall.
Tried calling pune office, wrote email for booking but just got the form to be filled which asks for membership number which was never provided by them.
There is no response from gallivant regarding membership number.
Please suggest how to claim refund.