Still no sms for the voucher that was promised - up to date after purchasing,

If it were up to me I would give them no star at all... What a pathetic service from their customer Care - I was in-store purchasing and requested to increase my credit limit which they did, and confirmed that on my next purchase of a R1000 or more I would receive an R200 voucher will be then sent via sms, I never got the sms im still waiting for it as my purchase was never discounted, I spoke to 5 people and was being transferred from pillar to post and still no SMS - I am very appalled and still wondering .