Urgent Bank Stamp

Here I am trying to call TymeBank and they are not picking up their phone. I spent over R100 airtime trying to get ahold of them today, all I get is that boring music. Imagine trying to get a stamp urgently with no help. I have to submit the document tomorrow before 12pm. Where do we go to for help? I am stressing now because I've been waiting long for this document so I can get paid. I regret opening a business account with them!