Day light ******* for powerhour

What a day light ******* . Never do airtime advance at all . I did advance for max R21 and only got R10 . This is for the 2nd time . I need to know where is the R11 . Vodacom know we dont check this and they take advantage of customers I previously bought power hour for 7 days yet the last day i couldn't use it . I also send a hello peter message with no response . Never do airtime advance people Vodacom take advantage of us and rob us . I want my money back . You guys are *****