@DavitUnfortunately, I am not on O2 anymore.
Instead of waiting for deployment of your ISP, do you have enough number of users in your department? I think you should try to ring the ISP you want to use and get quote for a bearer service if IPv6 is critical for your work. Then you can see whether you can use GRE, MPLS link or something else between the ISP and your own network and use your own IPv4/IPv6 address space on a new APN created for you.