There's not much to work ...

There's not much to work with here, but seems clear that the SBR is probably where the immediate problem is.

You need to ensure that the F/M ratio, sludge age, MLSS, MLVSS, SVI numbers are healthy. 

From what you said it appears you have recently re-seeded/restarted the SBR. Perhaps your biomass growth and sludge age are still not adequate after the reseed. This may explain the foaming and low removal rates, i.e. still acclimatizing. 

Ammonia removal process (nitrification) would take even longer to establish. If you don't have much ammonia in the influent, then you may have a lot of organic nitrogen that is being broken down in the SBR forming ammonia. Ammonia is basic; so it could be the cause of high pH. 

There are quite a number of things need to be looked at in order to find out the root cause. It is best to call in someone knowledgeable to troubleshoot your system on site. Good luck!