Got Scammed.

So there is this account on TG selling optional video lectures.Got scammed by him,he asked me Rs.499 for the Sociology optional video lectures and I sent him the amount.Now he is not replying and I'm almost sure that I have been scammed.I had read about this on this UPSC sub that there are TG accounts who sell lectures at a very discounted price but this is not the experience I wanted.If anyone can help me regarding socio optional lectures,please help me out or if you know someone genuine who is selling socio optional lectures.