what app did you download just before this started? … if you know, uninstall it
TrojanSpy:AndroidOS/Geimini.A
https://www.microsoft.com/security/portal/threat/encyclopedia/entry.aspx?Name=TrojanSpy:AndroidOS/Geimini.A#tab=2
i dont think the forum removal team work on phones … you may try avast support https://support.avast.com > submit a support ticket
alternative, factory resett your phone