Thanks for coming back to us @myss.
Refreshing your number on the network means that I have removed and re-added your number to the network, this is part of the trouble shooting that we use to determine issues, it has a similar affect to turning a hub or TV box off and on again. This should not need to be done to the number but It can sometimes resolve this type of issue.
I'm not sure, why you were told different information from two sources. Did the 0345 number confirm it was an issue with landline or was it just a fault in your area with all services.
Regards,
Steven_L