False gifts from MTN

MTN is just playing with people's mind. After loading airtime , they send you gift message of may be 250mb or 100mb depending on the amount you recharged and it goes ahead saying the gift expires within 24 hours from time of recharge. But what is funny is that you won't get that gift. Every time you try to redeem the gift, they will say unable to redeem gift please try again later. You will keep on trying until time is over then that so called gift will be taken off.