Uber India — promo code disabled

Uber has disabled promocode application without any reason.They told they will lift it after placing some orders .i have been placing orders since then and yet the ban has not been removed.Also they send misguided messages to me regarding offers to apply but once i order the offer gets not applied say promo codes are banned for this user.If its banned wht are they sending the codes to confuse the customers if they dont have plans to remove the ban which they placed for no reason at all.