Need help with NPS account opened through SBI

I opened my NPS account today through SBI internet banking, where I also have a savings account. It didn’t strike me then that I should directly open it from the e-NPS website. I got charged around Rs. 540 for the account opening, and it even displayed a significant monthly contribution charge.

Is it possible to shift the account to e-NPS? If not, how can I avoid the monthly contribution charge?

The SBI portal wasn’t even showing separate managers under each fund. If I have to continue with the SBI one, how can I select separate managers for each fund?

Even i have the same problem. How to change this?