@
Amortization - I'd be asking for a refund, with gentle reminder of any consumer protection that may be applicable under your legal system. If the so-called book was recommended (or worse yet mandated) by a teacher or educational institution I'd be asking them for a "Please Explain" note.
Otherwise I think you're up for some serious tin bashing on the epub, which would seem to be considerable work, or putting up with its malfunction.
If you want help with knocking the ePub into something usable I suggest you create a thread in the
MR ePub forum, with a link to this thread to provide context.
BR