Fed up with Discovery Insure

To whom it may concern.

From January this year i have sent proof of previous Insurance so my NCB can be updated. Each month i have to resend and follow up, i am fed up with following and re sending these documents. I am always told they cannot be opened, yet they are in normal PDF document and are not password protected. I have even tried calling but again i am told they need to be mailed.

I would like a response immediately and should a NCB apply i would like this to be back dated as I maybe paying a higher premium all this time because of incompetence. We have all our policies with Discovery but the service is absolutely shocking