Sorry to hear of your off Pentium, hope you recover soon.
Once you are up to it, take your BBS01 and battery off and stick it on a bike with 29"/700c wheels instead, your wheels will then roll over those big sticky out things instead of you
So Wisper have had your bike since April last year and are not responding to you?
Have you tried calling them using the number from their website 01732 762 393?
Wisper have a good reputation with folks on this forum as far as I know, so am surprised they are ignoring you
Sounds promising, sending back just the controller or the whole motor? Hope the supplier comes good. Please name check them here if you end up getting good service so others can consider them for future purchases