yes, that person transferred me and then one or two more transfers later I had some actual tech person who went "oh yeah, we do IPv6, I think, it's a business feature. How you get it, I have no clue."
It took another two months of probing and poking and unanswered call requests to B2B sales, to find out that in theory I could get a business connection, but it would cost me 10x as much with the only benefit being native IPv6. (It would be still over a crappy VDSL2 line at identical parameters).
Anyone remotely technical knows about IPv6. If that's what you get when you ask for tech support, ask if they have real technicians whom you could talk to.