I'm sorry to see you're unable to renew line rental saver until your contract renewal has gone through. You shouldn't lose your legacy free evening and weekends call plan as that should stay on your account still. If there are any issues when you do renew line rental saver, feel free to let us know and I'm sure we'd be able to find a suitable workaround.
I hope this helps.
If this post resolved your issue please click the 'This fixed my problem' button