Mystery Standard Bank account I do not know of

Good day Standard Bank,

Thank you, I have received an IT3(b) tax certificate for money I do not have nor authorised any to be placed in your financial institution.

Also, thank you for the attachment of the IT3 (b) which has to be opened with the account number, which of course I do not have, so therefore I am unable to view my so called mystery account. Not one Standard Bank representative contacted me pertaining to this account. The mail just popped into my mailbox without any explanation at all.

I would contact your customer service line but if you try for yourself it takes ages if someone answers or it just cuts off.

Please advise as a financial institution how I can resolve this? And please consider I have no tranport as residence is in a rural area Your assistance would be greatly appreciated.