eSIM Transfer Issues

I got a new phone. I make use of a eSIM. On the day I started doing my transfer Melon let me know the eSIM transfer (to new phone) can not be done as they are migrating to a new platform (not the first time I've heard this). Now, it's been the second day and my number is still not active. I can not log in to the bank at the company I work for. I can not make calls except WiFi etc. No prior warning of this issue. The only feedback I receive is they are working on it. Not good - not good.