Bad Service yet I am a Customer

I have Capitec Business account, made a transaction with LinkedIn subscription and only to realise that it was false adverti*****t. LinkedIn sold me a premium of R216 per month yet they charged my account a yearly subscription of R2600. I contacted Capitec to reverse the transaction but they come with stories that there is enough evidence for LinkedIn transaction yet I specifically explained and wrote for arbitration that it is not what I bought. Their only job as my banker is to reverse the transaction as per my request the business owner acquiring service from Capitec Business. I am really disappointed and I am going to post this on LinkedIn, TikTok and Facebook how they offer bad service to their clients.