Data bundle requested 7 days ago and have still no

On the 21st of July I requested 500mb of data be loaded onto my account once off, a request i have done numerous times. Usually activated immediately or a couple of hours after I phone the call centre. I have now phoned on Monday(22nd), Tuesday(23rd), Wednesday(24th) every time they say it is pending and has been activated. I still hadn't received anythin. I then sent a Facebook in ox message to their page requesting it again, as previously taken this route and got immediate response, not this time. I phoned on Saturday(27th) at 18:00 to follow up, the guy at the call centre said it will take approximately 40 mins, I phoned again at 20:00 and they assured me, i will receive it. I have still not received anything. I am being billed out of bundle charges because of this and dont even want to know what the call charges are going to stand at for every phone call. How is this possible?!?