There's no way the OP will provide more details about what really happened and how he was scammed because the scammer that him was among people who stole people credit card information and sell it online just like the service which d34dman offer and thats ghe reason why Rikafip ask if it was him that scam him.
It was probably the most simple of them all; OP sent the money first and then scammer just disappeared. Sadly nothing can be done about it now, but at least it can serve as a warning for other less experienced people what will happen if you trade with another newbie without using escrow service, so it's a good thing that he reported it.
I feel bad for Telegram. They become a breeding grounds for scammers. I hope that they do something about the trend because they are a pretty good messaging app in my opinion but with this kind of phenomenon happening, I will stay away for awhile.
People should simply be more careful, in this case they could have done deal through any other platform and result would be the same. It's not Telegram fault that people are naive and easily fooled.
Rule of thumb:you get unsolicited PM on Telegram, it's a scam. As simple as that.