Dispute on Card Transaction

I bought on FB greentea pills from merchant Customer Clairo for R70.00 but on 28 Nov an amount of R1440.54 went off on my bankaccount. I contact Nedbank on 28 Nov and I stopped my card for more transactions that can appear because this merchant is spam. They told me I must fill in a despute form to reverse the transaction and email it to ********** on 1 Des another 2 transactions went of on my account, R69.84 and R68.72 but my card was stopped for any transactions. I filled in another despute form and email it on 2 Des to the email address above. I called the Nedbank call centre with no help. I want my money to be reversed in my bankaccount as I have not received any products and it is a ****. Please can you help so I can get my money back in my bank account.