What you are dealing with is a computer virus. Get another computer, and restore the seed phrase on that computer, reinstall the infected computer (because anti-virus is so awful at detecting viruses in the first place that it just kills running programs).
Op is using a mobile wallet (trustwallet) so a computer virus is not the thing here. So high chance that he downloaded a fake app in the very first place. If this is the case restoring the seed in another device is completely useless.