Hello,
I also got scammed by www.bitbuy.in by making a payment to "Karl Weista". I called Paypal which told me that this transaction was not covered by "PayPal Buyer Protection Policy". Paypal told me to contact my Credit Card issuer, as this Paypal transaction was linked to my Credit Card. I did so and now there is an opposition asking this "Karl Weista" why I didn't receive the good/service that I payed for.
Hopefully, this is going to work.
In the meanwhile, you may noticed that www.bitbuy.in doesn't exist anymore, and that the scam is now under https://coin-mu.com (note the httpS) which is still link under https://en.bitcoin.it/wiki/How_To_Buy_Bitcoins_With_Your_Credit_Card