I would like to suggest that gem sales be offered mid-week rather than on week-ends as is the current practice.This would serve two purposes.
Firstly, many people have to make finance arrangements of one sort or another so they can make a purchase, and this cannot be done at weekends.
And second, if there is any problem with the transaction (such as happened with the gem sale at the end of April) then there are staff available at BB to assist straight away, rather than having to wait till the following week.