I think my iPhone 12 pro max has been hacked/has malware? I need help to confirm this or to get rid of the malware?

Let me start by getting the obvious out of the way, I’m using a iPhone 12 pro max, bought directly from the apple store, iOS has been updated to the latest version a few weeks ago.

Somehow my iPhone got hacked a few weeks ago and someone was able to get access to my emails and attempted to hijack an incoming payment to my company. At the same time I noticed the device kept heating up repeatedly and started to behave irratically.

As an immediate solution, I had visited the genius bar and they wiped and setup the device as new, but the heating up and frequent glitching issues have persisted and multiple visits to the genius bar havent been of much help.

The handset is still under Apple warranty but I’m not getting any help resovling the issue and I’m afraid that the handset has been infected by a malware via one particular app - BOTIM, but I can’t be sure, thus need help to scan the device to get rid of any possible malware/virus.