Hi @1Tash1, thanks for getting in touch via our Community Forums.
I am sorry to hear you've not received your cash back email as of yet. We've recently had a delay with our reporting system that processes these cashback emails. This has since been resolved and the email to redeem your cashback should be with you between 28/03/2019 - 08/04/2019.
I do apologise for any inconvenience this delay causes. If we can help with anything else, just let us know.