Why does my ringtone keep reverting to default
HI
recently upgraded from iphone 4 to iphone 6. Bought a new ringtone from I tunes on the iPhone 6 but it keeps disappearing and resetting the ringtone to default. When I go back into iTunes to download/buy the tone again it comes up with a message "you have previously bought this tone"
the tones I bought on my previous iPhone can still be seen and selected in
can can anyone tell me how to stop the ringtone disappearing? the employees at the Apple Store were not even remotely interested in helping and my network provider shop had no clue how to fix it.
thanks in advance
iPhone 6, iOS 8.1