Could it be that something has happened IRL to distract Jacob from this? Such as famil emergency etc?
I too have dealt with Jacob in the past, spent like £200 on some press kits, received them within the same week (bearing in mind I am also in the UK) and left feedback and all was perfect.
I doubt he's not responding on purpose, I imagine it is something in his personal life that is causing him to be non-responsive.
Hope you get an answer from him soon, and hope he's okay
xx