so i bought this shampoo from Bvivon online and i used only once and later found out that the company is a scam, and i got scared and emailed to the company because it was supposed to be like "pay only for postage and get a free trial" and yes, they were totally scam, they give me various reasons to make me pay and i dont know what to do, im thinking to go the the bank tmr and block the the company or take all my money from the account so there will be no left for them to take...but im also scared that they could put me in trouble for not paying for the product i got, and ive already opened(but it was supposed to be free!) so PLEASE HELP ME what should i do????

best regards