How to accept WAM offer using IB?, page-5

Try calling them. This was in the email:

Further Information
I encourage you to read the Bidder's Statement for more details about the Offer and about WAM. If you have any questions, please contact Wilson Asset Management's Head of Operations Martyn McCathie on 02 9247 6755 or Chief Financial Officer Jesse Hamilton on 0401 944 807. For amaysim-specific questions, please contact Rosa Smith on 0475 305 047.