Astraweb claiming non payment. New user, need a small amount of help

I recently tried to register a usenet account with BTC using an electrum wallet which I've created. Their site only allows for a QR code, or simply right clicking to gain the amount to be sent and to what address. I've sent the BTC, the payment has been confirmed 162 times. I have provided them with the transaction ID, as they requested and they are now asking for further proof of my payment? As a newer BTC user, I would like to know what information I should provide them to prove this transaction was indeed sent to them and recieved without giving out any of my own identifying info (other than a sending address of course).The transaction ID is: b12bc638529c0fed4a0b2464d72e6d124184d4ffb3506936cd3df9f21f1716c3
Can someone help me to know what other information I can provide to them as proof of payment or are the just trying to scam me because I'm using tor an BTC?

Thanks very much in advance.

I also got this, from their payment processing bot, and they are still refusing to acknowledge the payment:
This paymnet is varifiabe. Transaction ID#
b12bc638529c0fed4a0b2464d72e6d124184d4ffb3506936cd3df9f21f1716c3

here is a copy of ghe sales receipt through your provider :
Subject: Bitcoin paygate receipt payment order 970270.7000246
From: robot@multicards.com
Date: Sun, August 14, 2016 5:25 pm
To: theredking420@mail2tor.com
Priority: Normal
Options: View Full Header | View Printable Version | Download this as
a file

Payment/Order Confirmation from 'Bitcoin paygate'
Order Amount: USD 25.00

IMPORTANT:
Your credit card/bank account has been charged for your order.
Charges appear as 'Bitcoin paygate' on your Billing Statement.
The products/services you have ordered will be directly supplied and
invoiced by
Astraweb Usenet Server

Thank you for your order. Please contact our support department at:

http://helpdesk.astraweb.com

if you have any queries or issues.