OTP never arrives. Solution a compromise, not ideal

I have been unable to receive an OTP since December 2022. Tried to sort it out then, but apparently the people that can help with that (who are not customer services) knock off before 4pm. It was a Friday. Nice for some! I was forced to use an alternative payment method, which had a knock-on effect. Jump to today. Mobicred are in the process of sorting this out. The solution was I can receive an OTP via email but I must call them every time I make a purchase. I wanted to change the phone number on the account, but this takes DAYS. Days! The staff were as helpful as they could be, working within a flawed system. Fix the system to make it more customer friendly, please!! And sort out this OTP issue with the service provider.