I was attempting to edit MP4 phone personal videos and received request for activation, which requested reaction fee of 4.99 I paid received activation code and I was unable to activate. Then I purchased new package for $29.99 and received a new activation code. Yet I am still unable to download to photostory for editing.
In order to try to help you with this problem we really need rather more detail, please:
Which make and model of phone do you have?
Can you copy the files from your phone to your computer? If so, can you follow this tutorial and copy and paste here the results of the Tree view of one of your files? (The reason for asking is because mp4 is a "container" format; the actual content of the file could require a very specific codec to read it. Some mobile phones create video files with proprietary codecs which can be read only by the phone or by software the phone manufacturer wants you to buy!) AND, you should not be attempting to edit your videos without first copying them from your phone to your computer.
Having attempted to enter the activation code you received what, if any, error message do you receive? Please provide a screenshot or the full, exact wording of it.
Which version of PS do you now have? Mention of purchasing a new package would suggest you now have PS Deluxe 2027 but it would be very helpful to know this.
Which version and build of Windows are you running?
Finally, are you able to upload one of your video files to a file-sharing site (please don't attach one here in the forum since the forum software will "modify" it) and provide here the link for others to download it and test it on their machines?