I screwed up bad.. :(

So I'm caretaking my friend's account for him while he is at school. I'm using my tablet for this since I have my own account on my phone. I bought one of the speed packs, went into my inventory to upgrade them, and all the unlocked unassigned mods are gone. Even the ones I just bought from the packs. Is there any way to recover them? I noticed my credits went way up, so I must have absent-minded accidentally or fat-fingered sold them. If there's any way to get all those mods back and return all the credits, I'll do whatever I can to help achieve this. I feel so bad. His ally code is 596-553-511.