Pivot table reports stuck on regeneration

Pivot table reports stuck on regeneration

Hi, 

All my pivot tables have been stuck showing "regenerating" for 24hrs. All tables are now only showing partial data. There are only 4000 records in the entire database so not a lot of data at all. Problem is we need to report on that data TODAY!

I have contacted Zoho and they said they'd look at it but no solution since yesterday. Does anyone have any advice for me please? Anyone fancy putting on a cape and saving the day? It really is urgent for us. 

Thanks in advance.