Bank account transactions gone missing

ANY idea why the bank transactions (Reviewed & New) can just disappear?

Does anyone know whether there is a filter setting somewhere on the Banking that I can take off? 

Even new transactions diappear as we process and save  - not to even talk about the Bank Feeds that does not update at all 

will appreciate any help you might have 

I have checked thetransactions was NOT deleted by a user

I have tried to import the bank statements of the past 1.5 year, getting an error that my import is incorrect - then copied the example out and prepared the csv file on the example - still the same error 

I have tried another browser

I have cleared my history 

I have logged the issue with Sage support 

Its been 2 weeks now, month-end and VAT returns not done !!!