Why is my Account perm banned and if so how can I get it appealed?

I just got permanently banned on my account that I had for 4 years and I wanna know why and I have been playing nothing but Borderlands 3 for awhile now and halo infinite and fornite keeping to my self I have not received a new coms banned in almost a year and my reputation is on "GOOD PLAYER" I was playing Destiny 2 when a random person was Harassing me and I sent a message with no vulgar language and couple minutes later I get Permanently banned I have put a couple $1000's into your game store and including fornite and putting almost 159 hours into Destiny and i recently just bought a DLC for Borderlands from your Xbox store TODAY. I cant even sing in to see why I was banned permanently for inappropriate conduct or content when I don't even make content for anything I been keeping to my self and not bothering people. This is the only thing I have you guys already banned my Old account 5 years ago when i put almost 8 to 9 years into that account i know for a fact I did nothing wrong this time cause i checked on my reputation when i was able to I have everything 0 in every category besides cheating was 9 and unsporting was 44 even though my messages and voice are at ZERO, so it makes absolutely no sense whatsoever. I love Xbox i been a loyal customer for years and even after i got my old account banned for accused cheating, I made a NEW account with you guys and kept on playing till this day so I don't know what's going on or whatever by I know for a fact I was banned wrongly. So please I need help I do not want to lose everything again after working hard for everything again after I lost everything before, and the gamer tag is ""

:)