Digital transaction fees

I am a Gold Account member with unlimited internet transactions. Why am I being charged an additional digital transaction fee every month? Your helpline said it was due to proof of payments emailed (I never select SMS) when a beneficiary is paid via an internet transfer from my cheque account. Why? This does not make sense. Why is an emailed POP an extra cost? Is that not part of internet banking? It was never app**** in previous years.. only this year without any change to my account. Other than downloading the App....? (I never select the immediate payment options which I know incurs extra costs). On my bank statements it does not indicate which transactions have been charged extra... and why, so I have no idea how to reduce costs. Please respond at ***.