How to cancel a bid on smd

Good morning,I just registered on smd and I am new to the online platform as I am checking the cars mistakenly bid and can't find how to cancel the bid.first of all that is not the car I wanted to bid for secondly the branch i want to bid on is Pretoria or Sandton as I reside here in Pretoria any idea of how to cancel the bid cos it will expire today by 8