Iphone 11 / icloud accounts and settings compromised and exported.

my iphones pretty much brand new as i broke it over 2 year ago and just recently got it repaired, nobody has had acces to my icloud passwords or anything like my two factor authenticator code.

Ive ive ran scans on my google which is on the device but not linked to my icloud accounts and it was accessed through ad centre and google timeline. now ive reset re downloaded and checked everything, and it was fine for a day if that before i couldnt visit certain websites, apps wouldnt load and my icloud emails never arrive in my inbox as well as notifications becoming non existant.

i dont have a clue how why or when but theyve managed to embedd an API or several! by replacing and disguising themselves as my apps from what i can find. ive lost thousands of photos and stuff all my passwords compromised and now unable to use my phone as i dont trust it.

diagnostics says contact support and im lost for ideas or solutions.

any help in solving this will be appreciated.