Collect Pros LLC Valere Skin Collect Pros is charging me $98.71 for a $5.00 sample I paid for on a pre-paid gift card Pacoima California

I purchased a $5.00 Valere Skin sample on the internet with a pre-paid gift card. Now I am getting a bill from Collect Pros saying that I owe $98.71 to Valere Skin. I wrote a letter to Collect Pros disputing this charge,they responded with a second notice to collect this debt, I can not talk to a person at Collect Pros ,so I called Valere Skin and they said that they have no record of me and told me to call Collect Pros .I told them I can not get ahold of them and Valere Skin told me that they can not help me because there is no record of me.    I should not have to pay $98.71 for a $5.00 sample and I do not know what else to do. I think this is a scam and I do not want it to go on my credit report. I will not order anything else I thought it would be safe with a pre-paid gift card . I am just learning how to use the computer and did not know if the oder went through because the computer froze and turned off and I could find the page I was on and for got about it cause it was only $5,00 so now they want me to pay $98.71 for a $5.00 sample that I never recieved and they do not have record of .. Please help me on what I am supposed to do .