Home phone Help Please

Hello

We have a Telus home phone hub installed about a week ago. We are having some issues.

1. When we go *98 for voicemails we get a message "your call cannot be completed at this time please try again later." I know it takes a few business days for stuff to be ported over, but it has been longer than expected.
2. When people call the landline, the connection sometimes works after a few seconds of dead air and sometimes, not at all.   Do we have to call Telus customer support to solve this issue, or can someone at a Telus store fix it? Thanks.