ABSA cancelled our international transfer just before the rate jumped up

We requested an international transfer from Rands to USD on ABSA's internet banking. The whole process was very cumbersome and badly designed, but it went through successfully. We accepted the rate after being told we needed to authorise the transaction. Because of the ambiguous wording, we looked in the "Authorisations" section under international transfers. There was nothing there, so we assumed it was all good. After waiting 5 days and not seeing the money leave the account we contacted ABSA and they informed us that the transaction was cancelled because we never authorised it. There was no communication from ABSA and there was no pending authorisation. Since then the USD price has shot up by 60c. Now if we submit the transaction again, we will be paying a much higher rate, never mind how much later it is happening. If ABSA wants to retain us as a client they need to give us the same rate of 13.89.