transfering contacts to icloud

Try this:

1. Go to Settings>iCloud, turn Contacts to Off (unless it's already off), and choose Delete from My iPhone when prompted (they will still be in iCloud).
2. Download the app My Contacts Backup. Use this to backup the remaining contacts on your phone (from the other accounts/groups) as a vCard attachment to an email that you send to yourself. Confirm that you have received the email.
3. Go to Settings>Mail,Contacts,Calendars>Default Account (in the Contacts section), set this to iCloud. (This will cause new contacts added to your phone to be added to the iCloud account.)
4. Go to Settings>Mail,Contacts,Calendars, tap your exchange account and turn off contacts syncing with your exchange account.
5. Go to Settings>iCloud and turn Contacts back to On.
6. Open the My Contacts Backup email and tap the attachment to import the contacts from the other groups back to your phone. They should be added to the iCloud group, and as a result, will sync to iCloud.