Pathetic Client Services

My Business account was closed without without a warning or correspondence. I opened the account when i was applying for a government tender. I have been depositing money into the account to cover costs as i was told that is was i have to do until i get the tender. Now 6 months later i got offered the Tender( 3years) the account is closed without notice. I requested it to be reopened and they said they cant i have to open a new account. I really cant as i submitted all tender documents using this account. The business banker whom i was told i am allocated cant even send me the closure confirmation email or letter which i requested. He says Nedbank doesn't offer any. Is this the kind of service they are offering? I request that Nedbank reactivate my account. I have been depositing cash in the account.