Telstra Baldivis Store

Hi,
Got the first email about registration for headphones saying id then get another email with code for portal but never received it, not sure what now as time running out

Can I go to a Telstra store to sort out changing to NBN or do I have to deal with it on the phone. Also received a letter from Telstra saying my change over to the nbn network won't require any changes to my monthly bill, plan, contract period or hom ...

Can anyone tell me if you can purchase an ADSL Filter cord extension or adaptor connection?