BAD SERVICE & WORST SERVICE AT VODACOM CENTURION MALL

Vodacom doesn't really care about their customers. I have been trying to contact their call centre on 135 number, instead i have been referred to TOBI who can't assist with anything. I'm struggling to get through to their agents. Yesterday i visited Vodacom in Centurion Mall the service i got there was even worse as the technician i was send to was very rude to me, he failed to assist me, i ended leaving the store and i was very disappointed at the way he was treating me. He was shouting at me instead of assisting me. I have a serious problem that needed to be resolved by Vodacom but i am not getting any assistance from Vodacom. For the past weeks i have bought 2x 1GB Data that expires midnight, my problem is that they expire without even using them because when i try to connect on internet i struggle, The settings on my phone are correct, everytime when i connect to Mobile data and try to logon to my emails, i receive the message that says" Data not connected" its really frustrating as i spend money to purchase those Data's but ended up not using them. Can someone at Vodacom please assist? and can i also get my unused data back.