Marg Compusoft — given wrong info. about product and sold to me

Address:

Indore, Madhya Pradesh, 452016

I am a legal customerof marg compusoft, and facing a problem last one week contact many times to person from whome i bought the product i. E. Mr lalit indore m. P.. He is not reciving call. There is no offfice or contact /addres. Should i take a legal action.. As i was told that the software is gst ready. But it not suitable for composition scheme. I have paid rs14500 for the software i have feeded lot of data since last few months. Now i came to know that all my money and time is waste.
Please help.
Ihave bought the software after an assurance that i will get full post sales service. And first one year service will be free. Butnow there is no one to hear me