Vodacom App and website login issues

Vodacom boasts a \Double Data\" promotion - purchase data bundles on the Vodacom App and you receive double the amount of data purchased. For six days I've trying to take advantage of this offer only to encounter problems when I login, like a) internet connection error message even though I have full 4G signal b)my password is incorrect even though I've typed it correctly 3)When resetting my password I don't receive my OTP timeously or not at all. Vodacom - have you performed all the necessary testing before boasting promotions like this to your customrs?"