OneVanilla Prepaid card Company charged me for a purchase of $90.00 I have no idea what it is, I did not make this purchase internet

I purchased a onevanilla prepaid visa from Dollar General in Madera ,Ca 93638, on May 11, 2017. I purchased it so that I could get my bills paid. I added $140.00 at the time of the purchase. Shortly after I got home I paid $50.00 to Comcast for my cable bill, I then went to Amazon.com to order a new replacement battery for my laptop the total was $18.97. That was it I went to take care of my housework and later that evening I knew I still had $90.00 left on my card so I was going to order my daughter some shorts from Walmart online, but I went to check my balance to see if I had been charged any penalties first and there were two items pending and my card balance was at zero. GIFTME,INC for exactly $90.00 was pending and COMCAST CALIFORNIA CS 1X $50.00 pending. The Amazon purchase wasn't there and when I checked it had been denied. I went to the onevannia website and it showed that three minutes after I paid my comcast bill is when the giftme purchase was made. That is impossible first of all I don't have a clue what giftme,inc. is I did not make a $90.00 purchase and there is no way I could have made that purchase in three minutes from my other one. It makes no sense, so I called the number on the back of my card and was told that I in fact made that purchase and if I want to I can dispute the issue and maybe I would get a response within 90 days. I am very poor I need that money and they just took it and that was that. This is completely unjustified and it makes me sick that companies are being allowed to act this way. I am screwed and broke now.