I bought followers for my Facebook page and after 2 days they started dropping down without reason.
I contacted several times with the seller but the problem never fixed.
Finally I had to contact with Paypal snd ask for my refund.
In that moment, the seller threatened me and said that if I didn't close the dispute in Paypal he would write negative reviews and comments in my page.
Be careful with this seller.
It is a total fraud.