iCloud and backup issues

Hi, I am waiting for my new iPhone 7 so sold my iPhone 6 Plus today, the store I sold it to said to turn off find my phone, sign outbid iCloud and delete account, then erase all data, so I then went to use my old iPhone 4, tried a restore from back up ( that I did yesterday) but it says no back up found? So I set up as new phone, turned on iCloud but I've only got old contacts and notes, there's also only old notes and contacts now on my iPad
 
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