Authentication method

I phoned the Premier banking telephone line to enquire about a credit card payment. <br> <br> After speaking to a consultant, she asked me to authenticate myself using my telephone keypad. It involves the customer entering 6 digits of any of their bank cards and then entering the PIN number for that card. <br> <br> I have complained previously about this but it seems that this is the only way for me to authenticate myself with their consultant. <br> <br> I do not think it is safe to enter my PIN into the telephone despite what FNB tell me. I don't know where the call is being directed to. My key touches may easily be recorded by an ************ employee. I will then be left vulnerable to theft. <br> <br> Every bank explicitly warns you not to reveal your PIN to anyone under any circumstance. Why should this be different. <br> <br> Following my unwillingness to authenticate myself via this method I was told that there was no other way to do so. I was then unable to resolve my issue telephonically. <br> <br> It was eventually resolved via email