Payment guarantee

We are busy with a contract and need an advance payment guarantee from the bank in order to invoice equipment not yet on site. The money is in the bank, all we need is for the bank to complete the JBCC Advance Payment Guarantee form and send it back. When I phoned on 12 Feb, the first available appointment was only 17 February. We went to the bank with all the relevant information and Martha said it was no problem. Now it is the 2nd of March, we STILL don't have the payment guarantee, apparently ABSA's legal team need two weeks to read two pages. We have been unable to submit the invoice and now we will probably only be able to get paid at the end of NEXT MONTH. This is really poor service. Martha does not seem to have the answers so I am hoping whoever responds will.