Manipulation…

I’ve been ignoring text messages from this guy for a while after I told him we shouldn’t keep in contact anymore and this is the second time that after I ignore he’ll text me a day later saying damn you really hate me that much….I would love to answer and be like huh??? I literally have never said that nor argued with him or anything like that. I can’t block his number for professional reasons but do I rip his ass or just keep ignoring him and not give him the satisfaction of my attention?

Edit: our companies sometimes work together and we are expecting to be available by cell sometimes hence the professional part…I happen to know him before this but can’t block him bc I obviously wouldn’t want to explain to work he cant contact me on my personal number because he’s a f boy…