Good morning @TinaN
Welcome to the forums and thank you for taking the time to post.
I am sorry to hear that you have had some issues with your mobile.
It dose sound like you might have been migrated over to the Vodaphone network, If you follow the instructions listed above you will be able to know for definite.
Regarding your signal, Are you getting the R everywhere you go or is it in 1 specific location.
Kind regards,
Zak_M