Chargeback refuse to acknowledge *****

I respond to a adverti*****t on FB for a free sample from Pure Skin. I provide my creditcard details as I need to pay delivery of R59.65. My card was debited and as I received the sample I need to pay another R65 at the Postoffice. One month later my card was debited with R1260.52.On 14 April 2015 my card was again debited with R1226.03.Send email to chargeback to refund the money as this was *****. I did not sign anything and there was no terms and conditions on the Facebook page as they now claimed that was something of a supscription?On 13 May another amount went through my card and then I stopped my card. On 16 May the bank debited my card with a amount of R1609.05? and again on 25 May they debited my card with R1226.03. I send again a Chargeback claim form and then they send me from ***** department to claims to collection dep.After one month they refund me .Then on the 14 July and again in August they again debited my card and claim that it was a legal transaction and I have to pay the money monthly for a SAMPLE.I will stop my creditcard with Standardbank and move to another bank.It is very strange that the branch at Groblersdal recognize it as ***** but not the chargeback