Quikr — seller is asking more and more money to deliver product and not ready to refund money if i want to cancel order

Address:	Hyderabad, Andhra Pradesh, 500034
Website:	surat.quikr.com/userProfile?uId=DG8HYAQyBTIANlZvBGcOaABn&userEmail=DTQGIFQ7VzRRPwVgBz1RYVJmUncBf

I placed the order for marantz sr7011 av receiver on quick.com. Next day i received the mail from seller asking for order details and delivery address.

I placed the order for single unit of marantz sr7011 av receiver on september 12, 2017. And he asked me to pay 30% of the price of the product and so i did that. Next day i came to know that he has placed the order for 2 units on my name. After that he asked me to pay 14500 + 9500 for custom clearance as items were on hold by customs.

Here is the website for courier: http://alliancelogsnetwork.com/label.php
Tracking number: [protected]

Next day when clearance and everything is done he asked me to may more 8000 for delivery agent's flight and other charges.

After that he again asked me to pay more 12000 rupees.

So thus i ended up paying 54500 rupees. He always said this is the final payment but after i paid the amount he asked me to pay more.

Now he is asking me to pay more 12000 rupees. And without my permission he has placed order of two new items against my name.

Here is the website for courier: http://alliancelogsnetwork.com/label.php
Tracking number: [protected]

Now i am refusing to pay anything extra as i don't believe in this seller. As. Well when i am asking to cancel my order the seller is not ready to refund the amount as well

Here are the sellers details:
Name: haris kumar
Email address : [protected]@gmail.com
Mobile number: +[protected]
Shipper address:
Kumar –electro mart
Address:wickham/cottage, dane, o-coys, road, bishops, stortford, hertfordshire, cm232jp, uk

Account details:
1. Account meena satyanami
Acc n0: [protected]
Branch rewa ifsc
Code-sbin0000468
Sbi

2. Name harish kumar acc no [protected] ifsc code - sbin 0000468 branch rewa sbi

I think the delivery agent is also his person and he is also cheating.
Here is his contact number: +[protected]