My new iphone 6 does not give me a message notification sound or display the message banner when I get a message. Also the message disappears the next day ? I took the phone to the iphone shop they reset it and it was fixed until I did a restore from

My new iphone 6 does not give me a message notification sound or display the message banner when I get a message. Also the message disappears the next day ?

I took the phone to the iphone shop they reset it and it was fixed until I did a restore from backup. Whne i did that the problem came back again.

The problem was also their on my old iphone 5 and I changed to a new phone to try and fix it. but it appears to be a saved setting issue.

I do get the (same) messages on my ipad and i'm concerned that the ipad is getting priority over the messages ?

i'm really not happy with the service from apple on this issue and google is full of people with the same problem.

Silvana