Betfair Reward Plan

I am on the Betfair 'basic' rewards package and have been ever since the system changed, and we had to choose one. It suits me perfectly.    I've received a email today entitled 'important account information' and it tells me that 'the value of your rewards will be changing (from 1st March) based on recent activity', but then goes on to state 'your commission rate will not change unless you choose to change package within the hub'  Which basically contradicts itself.   
So when I log in it is highlighting the 'rewards+' box for me, which basically I'm not the least bit interested in.  Does it mean I will be placed on that automatically and have to request a change back again? I contacted the help desk (live chat thingy) who said I won't be changed over unless I request this.  But if that's the case why have I not received a basic email just reminding me of the alternative packages?  They didn't know. So I'm still unsure.   As I understand it we can only change packages once a month to start on the following 1st of the month, so if I let this go through I'll be stuck at 8% commission and  I can't change back for a whole month. (or will I be restricted from the basic package in future?)
Has anyone else had a similar experience and can tell me what happens?    Thanks