Ongoing harassment - GMs doing nothing

Starting in May last year I started wanting nothing to do with this person. I once considered this person a friend and I tried with him a lot longer than I should have because I felt sorry for him. The only reason I talked to him after May last year was because ignoring him didn't work. He'd make alts to get around my ignores and beg me to talk to him and follow me around and bother me. I've tried everything.

I'm not really the kind of person to report people. After months of wanting to quit because of him I finally reported him. I waited so long because I considered reporting a serious thing and I assumed once I finally did something would be done about it. I was wrong. I first reported him around January 1st. I've reported him many times since. It's obvious by he's actions nothing has been done or said. He stopped making alts to get around ignores a while ago but he still follows me around on occasion and spams heals on me and sits there and stares at me. All of which is no less upsetting than him making alts to talk to me.

I took a break for a few weeks a month ago and somebody in my guild started playing a character they'd had for years that had a similar name to his. He's whispered them a few times. The first time because he thought they might be me and then after that to try to talk about me. Just today he whispered me on an alt I had in the same guild that he didn't know was mine and then continued to spam heals and sit there staring at me. It's a small guild that most of my characters are in and he doesn't know or talk to anybody else in that guild.

I've avoided certain places and cities I think he would likely be at and that I always used to go to. I've gotten paranoid about whether he's on or not and when he'll next start bothering me again. I've gotten to a point a few times where I think maybe he's stopped and I've started to relax but it starts up again. Just this morning I was sitting somewhere I always used to sit and haven't been to in a while because of him and he came up and bothered me for hours emoting at me and sitting in front of me staring at me and healing me because I refused to let him run me off.

Sorry for this big long rambling thing but I'm just SO upset from a years worth of this. He's made it clear he won't stop. He's even tried to use gold he owed me against me to try to force me to talk to him. He thinks he can force me to be his friend. That's not even all of it. He's made it clear he won't stop. Nothing I've done has affected him at all nor have the many GMs done anything. I just want to get it through to him I don't ever want to speak to him again and needs to leave me alone. Can somebody please help me? I really don't want to have to quit. A game should be fun and relaxing and this isn't.