My Husband updated our system to S2 and we don't have any S2 compatible - now I can't update anything

We have a bridge, a Sonos Play 5, 2 Sonos Play 3 and and a Play 1

My husband upgraded to S2 - not realising he should not and told me that 3 of the rooms had stopped working.

I could see that 3 of the components had upgraded to S2 (Excluding Play 5 and Bridge)

So I have reset the 3 back to factory settings and I can seem them on the wifi network

However, despiite the fact that I can see Bridge and Play 5 from the Sonos controller 

1. I cannot add back the 3 reset components
2. Each time I try to do this I am told update needed, then I see update problem

I was with support for 3 hours last night and no solution in sight

any suggestions on what to do

I have not changed my Reuter in any way - although I have restarted it and both the Bridge and Play 5 last night