Making my life difficult

I switched to MTN from telkom and have been fairly satisfied with service until recently when I discovered I could no longer check my balance on the app. I do not use MTN for calls, only internet use. I called 083135 to enquire how I should access information. I was told by the agent that will need to remove the SIM card from the router insert it in a mobile in order to receive an OTP sent. That is it... non negotiable. Why is MTN MAKING MY LIFE DIFFIcult? cannot wait for this contract to end