renew current plan w/o costumer service!

That must mean whatever plan you have is no longer offered. You must be trying to force your plan to renew early, that’s the only reason for doing a plan change and select the same plan I know of. If that’s the case, unfortunately your only option is to wait for your plan to renew normally if you want to keep that plan. 

This is a customer populated forum not AT&T support.

We have no idea what you're talking about. You have not provided any reference point for the plans you may be asking about.