Bidvest mandate

I was asked to do the mandate so that my funds can be released from my payoneer account. Yet my second name is part of my surname and I can't edit that error and when i submit it says completion error! I've tried multiple times... Then my funds get sent back to payoneer! Tried again same story and now I tried a third time now I don't get any notifications where my funds are! Call centre doesn't answer and the email help line just gives an auto response. Very irritating as I need my salary to be released to my bank asap!